Originally Posted by site1Q84

You don't have to talk to anyone if you don't want to. If it's a meeting where they go around and room and everyone has a chance to speak (round robin, they call them) you can just say 'pass' when it gets to you.

Some people will likely come by and introduce themselves. A lot of people have been going to the same meetings for a long time so they notice when there's a newcomer, but they won't make you share or anything, they'll just introduce themselves.
Try to remember that every single person at the meeting you go to was once in your shoes. Everyone had a first meeting at some point!

You can always just sit in the back and observe. Just an FYI, 'open' meetings are for anyone interested in AA, 'closed' meetings are only for people who are trying actively stop drinking