Should I have folded AA?

Yes.

No.

Maybe (?)

ANY info helps, vs standard nl2 "reg" you probably should fold, else you probably shouldn't.

Maybe.

You should, cause now we know what he had. But during the game? Ofc no, he could have any straight/flush draw or just a pair and is putting you on A 10+ or maybe even and overpair to the board say 77-99.

Not allways, depens on the opponent. Iv seen weak regulars reraising with 2 overs and flushdraw, with weaker overpairs then yours etc. So all depends on your opponents, but generally fold to big action. Its semi rarely that they reraise with flushdraws and overpairs.

If we decide to 3bet on the flop, then our plan should be to call that shove. I would just call that raise on the flop, possibly even fold if villain is passive since we're 3way.

As played I think you should fold as you have clearly defined that you have a strong hand and literally at this stage I think all the draws are calling and becoming passive should they not complete. Also I think with lower limits the most value is gained not from fighting in spots like these but when they just call you with a weaker overpair or some top pair hand

I would call flop to his first raiase and check call turn probably chk/fold river too . I haven't looked at the spoiiler yet so will do so in a moment but NL2 is tricky for the reasons that you can have a massive fish bet like you saw there with top pair and an ace kicker or you can have someone wanting to just stack of with a flush draw but on the other hand as is mentioned a nitty NL2 reg probably only does this with a set. if they slow play KK QQ etc they will more likely just call or maybe raise the first time but not the seoncd.

My spoiler guess is one of the sets as with the board run out there isn't a conventional straight out there (this is nl2 though so I'm not saying 35 isn't possible). I think also most fish would call your flop 3 bet with a flush draw etc and play passive if missed.

No for the most part unless you knew this guy only does this with monsters and not draws. You can make an argument for just calling or shoving over his raise on the flop.