NL2, TPGK, UTG vs BB, Raise the donk bet OTF?

This is well played. I don't like raising OTF or OTT, you shouldn't do that with these hands. You usually want to do it with strong hands (at least 2pair) and then some bluffs.
OTR you can fold. There are some better hands possible and he shows strength with his donk 3 barrel.

We cannot raise for value as we still can isolate ourselves vs better hands. FDs, 2P+ will call for sure and we are behind in that case. Therefore, I'd say too this is well played. River is indeed a close call but the only hand you kind of beat is AT. All other hands from A8+ have you beat.

With no info i don't like raising neither on the flop or turn. I would call flop and turn but after you raised OTF the turn is kinda close call.

He dosen't look like a crazy player.

It could be not so bad to raise on the flop, but, in my opinion, the information that we will have calling 3 streets is sooooo important.
Maybe he's often bluffing with donkbet, and we'll raise often, maybe he's often nuts, and we will fold, AND we will 3 barrels a lot when he does'nt donk bet because his range will be weak ...

With our hand you can call 2 streets.
No raising, no building up the pot.

call flop 3/4 pot, call turn 2/3 pot, and call river 1/2 pot. No raises, fold to higher bets. If he bets carefully, he might have a weaker A, but he might have 2P/Set.