It does not seem so much like you need AA (you've do well without it), yet you might find some things useful. It will be a little difficult to get a good idea of these things from just a single meeting, so I would encourage you to attend several different meetings. AA is a spiritual program rather than a religious one. It took me awhile to understand what was meant by this. When you attend listen for the similarities to your experience rather than for the differences. I hope you find something useful.