I am laughing a bit right now remembering my first few aa meetings. I can completely relate to your aperhension on so many levels. I could give you 32 reasons why it could have been a bad idea to go. But you will find lots of welcoming people. I found so many in my paranoid state in the beginning I was trying to figure out their angle but turns out that people in recovery want to help others. Something about sharing the same level of misery.
Everyone in the room you choose for your first meeting will have had a similar experience. That's been another thing about recovery, it's taught me I'm not as unique as I thought I was!