From observing your posts I find this to be somewhat dishonest. You recognize that you don't believe in the God of the Bible. You also recognize that you could be wrong.
Both assertions lead to the possibility that there may be truth in the Bible, you just can't see it or believe it.
It seems you do believe things written by others that you can't prove by science to be true. So believing in things that can't be seen, a central tenant of the Christian religion, is also practiced by you.
So as with many humans, you have a belief, even a religion, it's just that your belief is in a different invisible un-provable truth than mine.
Personally I know I can't "KNOW" the origin of the universe, and neither can you. You have your belief and I have mine.
It seems a little self righteous to "Know" I am wrong, when you admit to knowing there is no way to "know" you are right.
So what you seem to be doing on this Biblical discussion forum is trying to convert others to your religion. But for me, I don't believe in your god, I choose to believe in another. You are free to your beliefs that you can't prove, I should also be free to my beliefs that I can't prove.