I agree that no one should be pushing religion on you. But you say you are willing. The Book says that is all that is necessary to make your beginning. You need not know, or understand what it is you believe in as long as you are willing to believe that there is something greater than you that can help you. THis willingness is sufficient regardless of how limited your understanding of a Higher Power may be at this time. Through working the steps you grow and come to know more of what or who your higher power is.
Anyone that says different is not talking AA IMO. The steps, although rooted in Christianity, are not a religion. They are quite broad and open to anyone who wishes to explore.
Do you have a sponsor in this group?