Well done on fleeing the drinks party weev.
You don't have to say anything at meetings if you don't want to (yet), you can just say "I've just come to listen", and people understand. Take it at your own pace weev, but it is good when we start to open up.
I don't go to AA any longer and have found alternative means of support but initially it gave, and taught me a lot. I will always remember many of the people I met in AA with fondness and respect.
ALL modalities for change have something to offer in my opinion and discount none, if that's what it is that keeps a person sober.
As for the brain fog I tried to put the broom in the fridge, can't remember the day of the month, words muddled and all as listed above. It is slowly improving but if, and the way that you write doesn't indicate it, there are tests that can be done as Meraviglioso suggests. I reckon it's all systems go weev!