Disclaimer that I am pretty new to this game and I am ESL so sorry for any crazy moves.

Preflop -> I guess that my open is standard
Flop -> I am betting range small on this board I have lots of A23, multiwat I am mostly betting small.
Turn -> I am not sure I think that I have some trips and other players too so checking AA with no low seems correct
River -> When the low and the straight complets I am folding almost all my only high hands, I am calling straights+ and some of my better trips .Although I think that UTG+2 have naked A2 a lot, so I am not sure

What do you guys think of my rational, in special my river fold?

Preflop

Hero UTG + 1 AdAhJh7d Raise to 3.5BB
UTG+2 Call
SB Call
BB Call

Flop 4d5dKc 16BB

SB check
BB check
Hero 4BB(25%)
UTG+2 Call
BB Call

Turn 28BB 4h

Every one checks

River 28BB 7c

BB check
Hero checks
UTG+2 28BB(100%)
BB fold
Hero folds

I think the preflop raise is too high with this hand.

Maybe you can bet again on turn. If someone has a 4 they will call.

The double suited is probably the best quality of this hand. AA7 isn't great. And you're in not great position.

Great comments, I do think that I should raise lower preflop in general. For now I am always betting pot, I guess that this is a problem. I have no grasp of sizing for this game.

Flop texture is extremely dynamic. I can't imagine betting that small with anything.

Yes, yes, yes, you can show that you have "lots of A23" if you make a pot sized bet.

Pre - standard. It's very dangerous to think that this hand is not "good enough" to open for pot. I would definitely not recommend you to have many sizings pre. If the hand is not good enough, then fold it.

Flop - I don't have tiny bets on this board, but I don't think it's that bad if you know what you are doing. Though as already pointed out, if you have a range advantage on this board and you benefit a lot from getting folds (like A23 does), you are incentivized to bet big.

Turn - there is some merit in betting (protection), especially against very straight-forward villains. With nfd checking makes sense, too.

River - fold.