If you have the desire to stop drinking, that's all you need and you DO belong! It sounds like your on a good track and very self aware which is awesome. I think if you continue to be mindful and open with your sponsor and therapist.
I am on step two also and have a hard time developing my belief system. I think it's a great idea to find someone with similar beliefs, but my problem with that is that I'm not sure what I believe! haha. My sponsor recommended the book A Woman's Way Through the Twelve Steps. This book really helped me. It's an easy read and offers a lot of alternatives to HOW we pray and talk about God. Highly recommend.
http://www.amazon.com/Womans-Way-through-Twelve-Steps/dp/0894869930
This is a good book that I bought when first trying to get sober. Highly recommend it.