Good topic as God or Higher Power is often a major sticking point.
I grew up with religion and believe in God. However, when I was new I asked why we ended meetings with the Lords Prayer if AA is not a religious program. I thought AA was non-denominational. I was told AA is not a religious program. You can make a door knob your higher power. O.k. I thought. Whatever.
When I hear newcomers share about not buying into the idea of a higher power I tell them not to look for reasons to leave AA. You don't have to believe but don't use it as an excuse to say, "Oh, I tried AA, It didn't work. Give me another shot and make it a double."