In order to prove God’s existence, you would have to define what “God” is.
Let’s say that God is “all-knowing”. Can you prove that God is all-knowing if you yourself are not all-knowing? If God says that there are 244 quadrillion stars in another universe, could you verify that? I doubt it.God could be “knowing-more-than-you”, which is not the same as “all-knowing”.
Let’s say that God is “all-good”. Can you prove that God is all-good, if you can’t delve into the mind of God and see for yourself, “Yes, there is only good here”? In addition, you yourself would have to have definite knowledge of what constitutes “good”; I doubt any human has such definite knowledge.
Similar arguments against proving God’s existence can be made with any “God is all-xxx” definition.
On the other hand, if you want to say, God is that which knows more than any human, is more moral than any human, or is more powerful than any human or thing; then that sort of God might be provable.
Otherwise, the “all-xxx” sort of God is not provable. That sort of God is only reachable via faith.