This is from preface to the book Alcoholics Anonymous:
If you have a drinking problem, we hope that you may pause in reading one of the forty-two personal stories and think: “Yes, that happened to me”; or, more important, “Yes, I’ve felt like that”; or, most important, “Yes, I believe this program can work for me too.”
So, without even stepping into the rooms of AA, one can visit AA.org and start reading the stories. I like "Bill Story" the best. The co-founder was not open to religious ideas and the stories narrates the difficulty with religious aspects and how he came to a conclusion he could use spiritual aspects of religious people. So you will hear AA is not a religious program but a spiritual.