Welcome to SR!
There are good AA meetings and there are crappy AA meetings. Personally, when I got sober I asked everyone I knew who attended AA to go with them to their meetings to check them out. That wasn't a bad way to start.
If you don't have any friends that are in AA then just check out this site:
Alcoholics Anonymous L.A. Central Office.
And possibly call the support line for LA area AA meetings: (800) 923-8722 (staffed 24/7) -- they can give you info on meeting times and places and advice for your first meeting.
This website helped me out a lot before I went to my first meeting:
Your First AA Meeting<
AA can be kind of intimidating if you've never been before, but that guide helped a lot.
Finally my last piece of advice is check out a few different meetings. Like I said, some meetings are great and some suck, so don't base your feelings of AA on one meeting. I made that mistake the first time around and ended up not getting involved in a recovery group a long time because I didn't think I liked them.
Best of luck in your recovery!