I want to know how to live and why etc.
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For a start, here's my summary of the Bible or Word of God which is a guide to life, for both temporal life on earth and eternal life in heaven.
0. God is Omnipotent, Omnipresent and Omniscient. God has His throne in heaven.(EZE.1, REV.4) Satan and his demons rebelled against God.(ISA.14:12, EZE.28:17, REV.12:4-9)
....... God-in-heaven desired to replace the spiritual rebels with S'piritual humans. Earth is like a test-bed for this purpose.
1. On earth, all humans are born sinful/evil/satanic because of Adam's Original Sin = unclean/dirty/unholy = bound for hell when they die.(ROM.5:12)
2. No humans on earth can see the true face of God and live.(EXO.33:20, JOHN.1:18 & 5:37)
3. To save fallen humans, God-in-heaven endeavoured to come down to earth in lesser forms as the invisible Spirit or as the visible human(= Angel of God or Jesus Christ). (JOHN.8:58/EXO.3:14, JOHN.1:1 & 14, 1TIM.3:16, 2COR.3:17, ISA.9:6)
....... As the Spirit, God-in-heaven gave His Law to Moses and the Jews, in order to curb humans' inborn tendency to commit sins/evil-deeds/satanic-deeds.(DEUT.28)
....... As Jesus Christ, God-in-heaven gave the apostles and Christians the sacrificial Lamb of God on the Cross(JOHN.1:29), in order to save them from hell when they die = the free gift of salvation or the kingdom of heaven through faith.(JOHN.3:16, MATT.4:17, GAL.2:16)
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A good analogy of our One and Only God is our one and only sun.
... God-the-Father-in-heaven sends His invisible Spirit and His visible Son-Jesus to earth to sustain immortal life = the sun-in-outer-space sends her invisible warmth/heat and her visible light to earth to sustain mortal life.
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The Bible or Word of God can be broken down into 2 parts, the Old and New Testaments/Covenants, ie,
(i) if you wanna have a good n long life on earth, you need to keep the Law/Word of God.(DEUT.28, MATT.19:21, ACTS.15:24-29, cf; 1COR.5:1-5 & 11:30, 1JOHN.5:16-19),
(ii) if you wanna go to heaven when you die, you need to be saved from hell by Jesus the Christ/Messiah/Savior.(MATT.5:27-30, ROM.5:12, LEV.17:11, HEB.9:22, JOHN.3:16, 1COR.6:9-11, REV.22:12-15)
Christians should aim to achieve both, ie to gain both blessings from God, eg MATT.19:23.
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Bc of our inherited Adam's Original Sin, we have the dual problems of INVOLUNTARY satanic/evil/sinful thoughts, eg immoral lust, hate, anger, greed, selfishness, jealousy, fear/worries, doubts, etc, ...and VOLUNTARY satanic/evil/sinful deeds, eg blasphemy, idolatry, murder, adultery/fornication/rape, stealing, lying/cheating/defrauding, etc.
....... The former resulted in being cursed/sent to hell when we die(GEN.3:14-16) and the latter resulted in being cursed by God with a sad and short life on earth. God's Law solved the latter and God's Son solved the former.
....... Usually, before someone committed murder, he/she had originally harbored hate or greed or lust or jealousy or etc in his/her heart and mind.(source is spiritually from Satan - JOHN.8:44, MATT.16:23 & 23:27, MARK.7:21, 1JOHN.3:8)) IOW, all humans are born satanic/evil/sinful/unclean, from their hearts to their feet.
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At ACTS.15:24-29, God/Jesus requires Gentile Christians to begin their born-again lives of the Spirit by keeping 4 easy or non-burdensome laws of Moses, ie avoid eating blood, strangled animals, foods sacrificed to idols and sexual immorality = minimum legal requirement. They r then given time to learn to gradually keep the other laws of Moses which are not a burden, esp morality laws, eg the Ten Commandments at EXODUS.20, LEVITICUS.10:9, DEUTERONOMY.18:9-14, etc.
....... In comparison, Jewish Christians are required by God/Jesus to continue to keep Moses Law, as many as possible, because it is not a burden to them.
....... Eg, Gentile Christians should still avoid homosexuality and continue to eat non-kosher foods because the former is not a burden but the latter is a burden(ie it's a burden for them to keep the food laws).
... Faith in God's Son, Jesus = faith in God's Word/Law/commandments because JOHN.1:1 says the Son is the Word and is also God.
We need to properly differentiate between involuntary satanic/evil/sinful thoughts and voluntary sins/evil deeds, and between involuntary or inborn Gentile and Jewish Christians.
Analogy about involuntary evil/satanic thoughts and voluntary evil-deeds/sins - black crows often squawks noisily over our heads but we should not let them build their dirty nests on our heads.