I've never felt judged at an AA meeting. Everyone there had been where I was at some point, and some people had been much farther down the scale! I was terrified, but am so glad I went and sat and listened and then went back the next day and the next.
You don't have to share or anything your first meeting; in fact you don't ever have to share if you don't want to. Eventually you'll probably want to. You'll have to introduce yourself with your first name when it's appropriate, and you don't even need to identify as an alcoholic if you don't feel comfortable with that. You can just say your name. No one expects anything from you. They'll probably make suggestions like: get some phone numbers, call before you drink, get a Big Book, find a sponsor, keep coming back, etc. They're just relating what was suggested to them and what worked for them.
I hope that was encouraging!