Hey,
I would 3b a bit bigger with 2 cold callers, 20bbs.
Postflop, small c-bet is fine, just make sure to bet big enough to make this a 2 street hand meaning, you can comfortably shove turn after your flop c-bet. I think you could have shoved turn with less than potsize here already. You are commited anyways.
You need only 19.9% equity to call his shove and...
Equity Win Tie
MP2 19.92% 19.92% 0.00% AhAs
MP3 80.08% 80.08% 0.00% 88, 33, T8s, 98s, 87s, JhTh, Th9h, 9h7h, 8h6h, 7h6h, 7h5h, 6h5h, 5h4h
You see you have that even against very nutted range, but on NL2 you will always see some hands that shouldn't be in his range which will only make this a better call. But as mentioned above, I would shove turn myself.
Cheers!