QQ vs. thin bet on river.

I think this line is fine. You have to bet flop and turn for value and protecting against draws. River I would check/call as well to catch possible bluffs or maybe even thin valuebets from TT/JJ. You're getting good odds here as well.

Seems well played. Sometimes you can bet for thin value on river as well.
Backdoor flush seems notto likely in his range.

Cheers,
SDK1987

Postflop is standard, preflop consider a bigger sizing to 3bet, like 60,65 cents. You dont want to give your oppenent great odds to call IP.

I think than in nl5, 4bb raises probabily is overpair

Since you are out of position, i would raise more preflop, like 80cents.
Flop and turn i would bet more, like 2/3 of the pot.
As played, on the river i would play check/call too.