Hello,
Preflop there's nothing else we can do here.
On the flop I prefer leading ourselves here against unknown.
When we check, raising against his bet is fine.
Turn isn't really a great card here since 4x now beats us, 56 and 66 as well.
I think check/folding here might be a decent option, since I think that he would love to check back something like A5 and mostly bet better hands here.
As played, the river is fine.
Best,
Plamen