I think it's a nice spot to squeeze as you will probably get HU with the fish often or win the pot right away but calling is fine as well.

As played, I think calling F+T is standard... At first glance I though river is an easy fold, but it might actually be close if he is aggressive. If he opens 56% he has a bunch of 4x here (A4s-J4s, 54s, A4o, K4o, 44). Additionally we block a lot his nut flush draws and he probably checks back his Qx flush draws. So folding should be fine usually. However, if he 3barrels all his non-pair FD combos and his 87,97 combos then it becomes a call.

So I guess it's kinda villain-dependent but folding is probably better against the majority of NL50 players.

I think you'll run into an overpair or better a lot here + you block the Ah, which makes this a fold imo.

I would fold too with Ah. I would not fold if I didn't have Ah.

Flop/turn standard calls I would say.