[Triiooman]

There is another way to handle this confusion.
You ignore all traditions and ignore that matter of reincarnation.
You study the Buddha's dhamma and pick one or some which you think it is or they are useful to you.
Then, you practice/do the one(s) you pick.

(If anything relates to supernatural matters in your view, you just skip them.
No need/requirment to believe or not believe them now.)

The Buddha's dhamma is so wide and various.
You do not need to involve the supernatural things at all.
Many people may do otherwise because such is matched to their needs, which is also not wrong.
But you can leave them, and should go to the way useful to your need and practice.