AA on suited board

Why are you donking turn ? it's a check/call here.
I mean if you are bet/calling flop. I guess reraising flop is also possible and would simplify things here.

Because I had no idea what to do on river, after I check call turn. What should I do, when I check/called turn and river came something insignificant (not 4th color)?

And after you donk and he calls or raises you on the turn, you know better what to do ? (Doesn't seem simpler to me)
When he's raising he's taking back the initiative, you have to let him as you're kind of WA/WB (unless you choose to repop flop).

On a blank river (after check/calling the turn) it's a crying call or a fold depending on what you expect villain to be able to barrel through. Anyway people have a strong biais against check/calling in though spots as if putting the chips yourself first (getting no value whatsoever) when you're beaten would feel less fishy whereas if you don't know where you stand, betting is often worse.