9 handed, .50/1

UTG Villian (61.25) raises to 3
Middle Position Fish (247.13) calls
Big Blind Hero (563.50) calls with KdJd
Pot: 9.50

* FLOP * [Kh Tc Qs]
Hero checks to villian who cbets 7.00
Fish calls
Hero calls
Pot: 30.50

* TURN * [Kh Tc Qs] [6h]
Everyone checks

* RIVER * [Kh Tc Qs 6h] [Jc]
Hero checks
Villian bets $15
Everyone folds

I'm not sure, but I feel like I took a too passive route. I'm not sure how to play these draws out of posiiton.
I think a 3bet preflop was definitely possible. On the flop, I didn't think a checkraise was called for since I have enough showdown value with top pair, and I want to keep villian's bluffs in his range. I didn't think I could get called by worse unless they have Jx, or maybe AQ. Definitely can't fold out better AK/ 2 pair +. And I didn't think I had to protect my equity since only the Jack could be annoying. Maybe I played this fine but just had a terrible river. I just feel like there should be something to improve on since I flopped so much equity.