If I was you, one I would stay away from AA or NA. They will teach you that you're an addict and you're "powerless" over weed. By teaching you that you're an addict, you will begin to believe this is true and start using hard drugs as if you were an addict. It's a self fulfilling prophecy. Plus AA/NA has a 95 percent failure rate, so, it's pointless to go. AA/NA is real big on this belief that only god can save you. Oh and they will tell you, you have a disease. Which is not true, just a bad behavior.

If you really want to stop smoking weed, you will. If you get tired of smoking it, then you will stop. It's pretty easy. If you enjoy smoking weed, then that's on you. It's your decision if you want to stop.