Bluff ?

When that fish doesn't fold to your flop raise it means that he has something. A pair, set, flush draw. I would not raise on the turn. Calling on the river is a mistake. You have ace high so you beat only missed draws. How many missed draws can he really have on the river?

I do not see a reason for raising. Such a fish will call you, but as our hand is not that strong I prefer just calling.

I think that we could raise flop and raise turn if we get min-bet. Against fish like this a bigger bet equals better hand almost always. So as played, turn is a fold.

What is this guy's Went to showdown value? If it's high, then I think you should just call this flop min-bet and try to hit a diamond/A/T on turn.

Raise on the flop may be considered correct as long as you consider this value, I wouldn't. I played once nl2 and haven't noticed any thin value-bets from fishes with K-high