Hand 1:
Hero opens Ac Ks from EP, everyone folds, bb calls
Flop: 3c Kh 2h
Hero bets 1/3(its probably more of a check in theory but I still prefer to c-bet), the villain check raises 7x my bet What do I do here? It seems like it's very weak to this check raise but what is he really check raising with? It's most likely a set, maybe nut FD. I of course called.
Turn: 8d
Villain bets 3/4 and now it's a very high chance it's a set. A lot of people just check after they didn't hit their flush. I fold. Shouldn't I just fold on the flop? It's micros in the end of the day, not high stakes.

Hand 2:
CO opens, I 3b AhQc from BB
Flop: 6c Qh 4c
Hero c-bet 1/3, CO calls.
Turn: Jh
Hero bets 3/4, CO jams 80bb, Hero calls. In theory it's probably a call but I don't know about that one or is this spot one of the 'I have to call'? What would you do here?