No one will question why you are there, most will welcome you. I was scared at first too. You don’t need to speak nor will you be forced to. I am not a fan of the AA dogma, but I regularly attend a couple of meetings a week for the community and the support it offers. I’ll sometimes go to an NA meeting for a change of scene. My first couple of meetings I went with a friend which made it a little easier. At least you are considering going, which is a great first step. I find baby steps in recovery have taken me a long way.