Currently, I am not a Christian. At one point in my life I thought I was but I've fallen so far from God that I'm not even sure I was ever serious about Christianity to begin with. I want to be a Christian but I'm not sure how

I believe in the Bible, I believe that it is innerant, I believe in God, I believe in Jesus, I believe that Jesus suffered and died on a cross to defeat sin so that we may all be saved IF we choose to die to ourselves and live for him, I believe that he was miraculously resurrected and ascended to His Kingdom where he now sits at the right hand of God the Father, I believe that we should want to be saved not just so that we can go to Heaven when we die but so that we can have a real, close, personal, intimate relationship with our Creator, I believe that all of my sins can be forgiven and that God wants to have a relationship with me too, etc. I believe all of this, I know all of it is true and that I need to do this because I want to and because it's right, but I don't know how. Probably sounds weird, huh? I know

It all looks/sounds/seems so easy but something is keeping my from taking the leap and just giving myself to him. Maybe I'm feeling like the post-salvation lifestyle is too difficult? Maybe I'm afraid that, like every time I THOUGHT I was a Christian in the past and failed, I'm just going to go with the motions or think that I'm saved and then back off or fall away again after a few months? I don't know. I really don't know what it is. All I know is that the Bible and all that it contains is absolutely undeniably true and that I want to live my life as a child, servant, and friend of the God of this universe. Please pray for me. I don't want to waste anymore time. I just feel so detached, like my heart is so hard. I'm afraid that I won't be able to take this step. Thank you.
I like your post, it shows a lot, it shows your honesty, it shows your desire to want to be saved.
There is a reason for that desire, the reason is the Holy Spirit is speaking to your heart, Father has not abandoned you, even if you feel you have abandoned Him. If Jesus has abandoned you, you would not have those feelings in your heart.
You want to be a Christian?
you already believe that the Bible is the truth, you already believe Father sent His Son, Jesus to pay the penalty for our sins, Here is what you need to do, if you believe the above in all sincerity from your heart.
Stop saying that you want to
become a Christian, and start thanking Jesus that you are a Christian, because you believe with your heart that He did save you from your sins, confess that with your mouth out loud, yes
Thank you Lord Jesus from saving me from all my sins. I believe it with my heart and I confess it with my mouth, you Lord Jesus have already saved me.
Romans 10:9-10
9That if thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised him from the dead,
thou shalt be saved.
10For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation.
There you go, the infallable Word of Father.
Believe,
trust, and
confess what Father has said, your sins are not greater than His promises and mercy and the Blood that Jesus sheed for you. Start thanking Jesus for saving you, He saved you 2 thousand years ago.
In spite of your failures and sin Jesus has not given up on you, that is evident in your post.
Trust in Jesus to help you in your Christian walk, if you try to be a Christian in your own strength, you will fail, when you fail, take it to Jesus in prayer, confess it, ask Him to help you, that is why He is sitting at the right hand of Father, to help you, He loves you and will not fail you.
can the post salvation walk have some valleys, yes it can, are the valleys worth it,
absolutley yes, nothing in this entire world can compare to having a loving relationship with Jesus and Father, and knowing in your heart that Father loves you.
lets pray
Father I do believe your Word, I believe that Jesus paid the penalty for all of my sins, and paid for them in full, I confess with my mouth that I am saved, because I believe your Word, and I thank you that I am saved. Father I have failed, I am sorry I failed, Lord Jesus forgive me for my sins and failing, Lord Jesus I want a right relationship with you, Lord Jesus I need your help to do your will, and I thank you Lord Jesus that you do help me to live my life for you. come in to my heart Jesus cleanse me of all my sins and continue your work in me, that I may be pleasing to you, because that is my desire. In Jesus Name amen