Hey and Welcome-
I am no expert on this- by any stretch. But my experience with AA meetings has always been good. Just know that you don't have to say anything at all. Its really not a pressure experience. If it comes a turn or something to speak (which is unusual) just say 'I would like to pass'. Thats what I did the first few times then wanted to talk a little afer a few meetings...there are a lot of groups so if your first one doesnt work out try another?? I am not promoting anything- but AA is good IMO from my experience.
Great job on the 3-4 days- thats amazing, I am working to get to that point, not far off.
Dub