Yes, AA has made/is making a fundamental difference to my life.
I'm not a religious person either and wasn't sure what to expect. In the early days I just needed somewhere to go to be with people who understood and didn't judge me. It was like being on SR but only face to face.
Since I've got deeper into it, I have learned to embrace it totally and it suits me. I still have no religion but I do have a faith in something that is personal to me.
There are alternatives to AA, check out the secular forums. I can only tell you what has worked for me. I need face to face support, I need numbers to call when I'm in trouble. I need to feel supported all the time I guess.
You can do this xx