Now faith is the substance of things hoped for, the evidence of things not seen.
Faith is personal. When I was an Atheist, I asked God to prove himself to me and that he did. I wouldn’t consider this proof for anyone but myself and that is why it is my faith. I cannot give anyone my faith. They have to seek God for themselves if they want faith in God.
That said, there are things that do prove the existence of God because he is self-evident. But as to who that God is, only those who seek God can know him. All else is religion that men practice as a way to get to know this God. But unless you seek God for yourself, and as long as your connection with God is exclusively through a religious organisation or another person, then that is as long as you have not found God.