Just wanted to offer encouragement, Shutterbug. I always feel much better when I leave a meeting. I know the nervous feeling. When I was younger I definitely remember driving to meetings, sitting in the parking lot watching people go in, then leaving cause I was too nervous.
I NEVER regretted going to one. Not once. Since MA is not nearly as common as AA/NA, there's a good chance that you'll see the same group of people at both! It's a great way to make new friends/contacts who will support you.
Take care! Let us know how it goes.