How do you pray to a God you’re not really sure is there
John the Baptist doubted. Thomas doubted. Great men through history have struggled with doubt. God got them through.
Here is the best advice I know to give you on this subject: take your doubts to God.
Pray about your doubts. Present them to Him honestly. He knows what you’re thinking anyway.
I go through struggles with doubt every five years or so. I keep taking my doubts back to God, and he always comes through. Not overnight, but over time . . .