There's evidence that Jesus travelled to India and Tibet in his younger years, there where the bible says he was a carpenter during those years. There's many video's on this subject. Here are just two:
7min: https://www.youtube.com/watch?v=XjERTNVXgfg
30 min: https://www.youtube.com/watch?v=TEvomvO8cb0
This is important to know because it helps us to understand what Jesus really meant with that you have to go through him to enter the Kingdom of God. What this really means is that you have to become ego-less (like Jesus) to enter the Kingdom of God.
In Eastern traditions this is often referred to as ego-death or Enlightenment. And to achieve ego-death we need to go within. "Know Thyself" and "The Kingdom of God is Within" is what Jesus said.
Praying really hard to God and Jesus and accepting Jesus as your saviour will not get you out of the reincarnation process. And yes, there is evidence that Jesus originally spoke about reincarnation as well. But obviously the TPTB did not want to empower the people and therefore they would have had enough motivation to scrap reincarnation from the bible.
If you don't achieve ego-death, like Jesus, in this lifetime you don't have to worry. As long as you did not live your life in a completely selfish manner, you will go back to that place called heaven and then after a while you decide to reincarnate again. Even if you do end up in hell (which will feel like an eternity) you will get a chance again to redeem yourself. Even our brothers and sisters from the darkside were created by God.
Don't let dogmatic believers convince you that you only have one chance. People saying you only have one chance should have a good hard look at themselves. Instilling people with fear is not a good thing and is not what God and Jesus are about.
I'm not saying you're following them directly, however your beliefs from everything you've said so far in this post and comments aligns pretty closely with what we see coming from the mainstream New Age movement. It seems from what I can tell that you believe one of their narratives whether you mean to or not.
That said, a number of your criticisms of Christianity have been absolutely factual and accurate. However I would argue that those problems in Christianity come directly from people purposely infiltrating it and corrupting it. This is why you see the worst of the worst like Joel Osteen, TD Jakes, Hillsong, etc leaning toward exactly the kind of beliefs you're describing.
This song is great. https://www.youtube.com/watch?v=jBZYMUP2LDk
Then you notice that they recorded the song in front of a humanoid goat statue.
What.
Then you look up that statue and find that it’s in a place called five points south.
Oh, like an upside down pentagram?
Now why would a Christian pick that location in front of that statue to sing to God?
What god are they trying to praise?
Shame, cause it’s a nice song, otherwise.
There's not that much to believe. Jesus wants us to WALK the path within and FIND the Kingdom of God.
Jesus did not instruct us to believe things and to be nice, so that we could then enter the KIngdom of God. We as humans need to take action and walk through the darkness to get to the Light.