Don't believe in anything, not even in God, look for what's absolutely True.
Start from a point of "not-knowing", not agnosticism, but actually throwing out all your ideas and assumptions about what reality is.
This will open your mind up to the possibility of discovering what's absolutely True about the universe.
About the "God-question" specifically, here's an amazing audiobook so profound that it'll totally change your life:
The author directly channels God in a series of detailed dialogues explaining the entire structure, function, and purpose of human life, dispelling many orthodox religious myths about God, morality, politics, and sex.
This whole 3 part series definitely counts as one of my top favorite books of all time. It's just utterly pure and truthful!!!