imo AA/NA can be a beautiful program for some people, just like christianity can be a beautiful religion. however, if you wanna get hardcore, you're in a fucking cult, and that's all there is to it.
the majority of people at the probably 500+ NA meetings i've attended in my life are sick, stupid, cruel and pathetic fuckers. sorry, but that's the truth. that goes for newcomers and oldtimers alike. i know because i was one of them! there are some very wise people in those rooms, and some very loving and honest and endearing folks too, but they're so few and far in between, it's barely worth the hassle.
in a lot of ways NA saved my life, and re-opened me to spirituality, something that i'll always thank it for. but in other ways the things they indoctrinated me with, the endless moralism, the horrible sense of guilt, are injuries that are very far from being healed.
my suggestion is to keep an open mind, but maintain your boundaries. don't fall for the group-thinking shit, it's toxic as fuck. don't let your inhibitions keep you from learning a few things, too, though, as there really are plenty of people in there who have seen it all. just be reasonable, easier said than done, but that's the best advice i can give.
good luck!