I am so confused by all the different websites I read online
In my opinion, the Gospels - particularly the Gospels of Matthew and Luke - are probably better sources of this kind of knowledge than the Internet (see below). These are only my opinions, though. As the handle says, I am not a theologian.
1. What must I do to be saved and spend an eternity in Heaven with Jesus Christ?
Then Jesus told his disciples, “If any man would come after me, let him deny himself and take up his cross and follow me.For whoever would save his life will lose it, and whoever loses his life for my sake will find it.For what will it profit a man, if he gains the whole world and forfeits his life? Or what shall a man give in return for his life?For the Son of man is to come with his angels in the glory of his Father, and then he will repay every man for what he has done.
(Matthew 16:24–27)
“Woe to the world for temptations to sin! For it is necessary that temptations come, but woe to the man by whom the temptation comes!And if your hand or your foot causes you to sin, cut it off and throw it away; it is better for you to enter life maimed or lame than with two hands or two feet to be thrown into the eternal fire.And if your eye causes you to sin, pluck it out and throw it away; it is better for you to enter life with one eye than with two eyes to be thrown into the hell of fire.
(Matthew 18:7–9)
And behold, one came up to him, saying, “Teacher, what good deed must I do, to have eternal life?”And he said to him, “Why do you ask me about what is good? One there is who is good. If you would enter life, keep the commandments.”He said to him, “Which?” And Jesus said, “You shall not kill, You shall not commit adultery, You shall not steal, You shall not bear false witness,Honor your father and mother, and, You shall love your neighbor as yourself.”
(Matthew 19:16–19)
“Then who can be saved?” But he said, “What is impossible with men is possible with God.”And Peter said, “Lo, we have left our homes and followed you.”And he said to them, “Truly, I say to you, there is no man who has left house or wife or brothers or parents or children, for the sake of the kingdom of God,who will not receive manifold more in this time, and in the age to come eternal life.”
(Luke 18:26–30)
and perhaps most importantly
“When the Son of man comes in his glory, and all the angels with him, then he will sit on his glorious throne.Before him will be gathered all the nations, and he will separate them one from another as a shepherd separates the sheep from the goats,and he will place the sheep at his right hand, but the goats at the left.Then the King will say to those at his right hand, ‘Come, O blessed of my Father, inherit the kingdom prepared for you from the foundation of the world;for I was hungry and you gave me food, I was thirsty and you gave me drink, I was a stranger and you welcomed me,I was naked and you clothed me, I was sick and you visited me, I was in prison and you came to me.’Then the righteous will answer him, ‘Lord, when did we see thee hungry and feed thee, or thirsty and give thee drink?And when did we see thee a stranger and welcome thee, or naked and clothe thee?And when did we see thee sick or in prison and visit thee?’And the King will answer them, ‘Truly, I say to you, as you did it to one of the least of these my brethren, you did it to me.’Then he will say to those at his left hand, ‘Depart from me, you cursed, into the eternal fire prepared for the devil and his angels;for I was hungry and you gave me no food, I was thirsty and you gave me no drink,I was a stranger and you did not welcome me, naked and you did not clothe me, sick and in prison and you did not visit me.’Then they also will answer, ‘Lord, when did we see thee hungry or thirsty or a stranger or naked or sick or in prison, and did not minister to thee?’Then he will answer them, ‘Truly, I say to you, as you did it not to one of the least of these, you did it not to me.’And they will go away into eternal punishment, but the righteous into eternal life.”
(Matthew 25:31–46)
Keeping in mind that in Greek the exact same word is used to mean "save" and "heal" or "be made well", perhaps we could meditate on the following:
And behold, a woman who had suffered from a hemorrhage for twelve years came up behind him and touched the fringe of his garment;for she said to herself, “If I only touch his garment, I shall be made well.”Jesus turned, and seeing her he said, “Take heart, daughter; your faith has made you well.” And instantly the woman was made well.
(Matthew 9:20–22)
And they came to Jericho; and as he was leaving Jericho with his disciples and a great multitude, Bartimaeus, a blind beggar, the son of Timaeus, was sitting by the roadside.And when he heard that it was Jesus of Nazareth, he began to cry out and say, “Jesus, Son of David, have mercy on me!”And many rebuked him, telling him to be silent; but he cried out all the more, “Son of David, have mercy on me!”And Jesus stopped and said, “Call him.” And they called the blind man, saying to him, “Take heart; rise, he is calling you.”And throwing off his mantle he sprang up and came to Jesus.And Jesus said to him, “What do you want me to do for you?” And the blind man said to him, “Master, let me receive my sight.”And Jesus said to him, “Go your way; your faith has made you well.” And immediately he received his sight and followed him on the way.
(Mark 10:46–52)
One of the Pharisees asked him to eat with him, and he went into the Pharisee’s house, and took his place at table.And behold, a woman of the city, who was a sinner, when she learned that he was at table in the Pharisee’s house, brought an alabaster flask of ointment,and standing behind him at his feet, weeping, she began to wet his feet with her tears, and wiped them with the hair of her head, and kissed his feet, and anointed them with the ointment.Now when the Pharisee who had invited him saw it, he said to himself, “If this man were a prophet, he would have known who and what sort of woman this is who is touching him, for she is a sinner.”And Jesus answering said to him, “Simon, I have something to say to you.” And he answered, “What is it, Teacher?”“A certain creditor had two debtors; one owed five hundred denarii, and the other fifty.When they could not pay, he forgave them both. Now which of them will love him more?”Simon answered, “The one, I suppose, to whom he forgave more.” And he said to him, “You have judged rightly.”Then turning toward the woman he said to Simon, “Do you see this woman? I entered your house, you gave me no water for my feet, but she has wet my feet with her tears and wiped them with her hair.You gave me no kiss, but from the time I came in she has not ceased to kiss my feet.You did not anoint my head with oil, but she has anointed my feet with ointment.Therefore I tell you, her sins, which are many, are forgiven, for she loved much; but he who is forgiven little, loves little.”And he said to her, “Your sins are forgiven.”Then those who were at table with him began to say among themselves, “Who is this, who even forgives sins?”And he said to the woman, “Your faith has saved you; go in peace.”
(Luke 7:36–50)
3. How do you get or have saving faith?
The Apostles once beseeched the Lord,
Increase our faith! (Luke 17:5). Jesus did not give them a direct answer, but said rather:
“Will any one of you, who has a servant plowing or keeping sheep, say to him when he has come in from the field, ‘Come at once and sit down at table’?Will he not rather say to him, ‘Prepare supper for me, and gird yourself and serve me, till I eat and drink; and afterward you shall eat and drink’?Does he thank the servant because he did what was commanded?So you also, when you have done all that is commanded you, say, ‘We are unworthy servants; we have only done what was our duty.’”
(Luke 17:7–10)
From this we can conclude perhaps that the Lord will give us the faith that we need
when we have done all that is commanded us (Luke 17:10).