TPTK on turn, poorly played flop

Fresh table, only saw villain take 2 hands to showdown, both were low pp's where he missed and check/called to showdown on wet boards and lost. Still not enough hands for any reads.

I decided to skip the cbet here with the intention to fold to a bet since I didn't have position and it was a 3way pot with unknown opponents. Was letting this hand go here a +EV decision? Also, I'm wondering if betting the turn was a mistake since I had given up on the flop. The line I took screams I missed the flop but just hit my ace. His call gives me no information on the strength of his hand. I think his range is Ax or any pp most of the time. With how much information I gave him and paired board, his shove on the river is just too easy to fold so I'm not so concerned about that.

Full Tilt No-Limit Hold'em, $0.02 BB (6 handed) - Full-Tilt Converter Tool from FlopTurnRivercom

Hero (UTG) ($2.04)
MP ($1.79)
CO ($1.87)
Button ($2.12)
SB ($5.13)
BB ($1.83)

Preflop: Hero is UTG with Kh, Ac
Hero bets $0.06, 2 folds, Button calls $0.06, SB calls $0.05, 1 fold

Flop: ($0.20) 9d, 5s, 8c (3 players)
SB checks, Hero checks, Button checks

Turn: ($0.20) As (3 players)
SB checks, Hero bets $0.18, Button calls $0.18, 1 fold

River: ($0.56) 9h (2 players)
Hero bets $0.20, Button raises to $1.88 (All-In), Hero folds

Total pot: $0.96 | Rake: $0.06

I click my HUD, and see what both opponents Fold to C-Bet ratio is. If both are very high, I'd bet here. Since there's a draw out here, I'd be more prone to bet it than not. Also. it's picking nits, but I think you can get away with a like .13-.14. Everyone who's folding is folding for 2/3rds pot anyway. River bet was also small.

I would argue that your Flop could be considered standard in the right environment.

Turn is debateable,

River bet sizing is not good IMO.

hand looks standard to me

Flop check is totally fine. 56-QJ, 66-77 are very likely to call you, maybe even underpairs, and a draw could even check-raise you out of the hand when you still have some equity.
Turn is fine... I don't get what he's doing on the river, but I'd just give him credit for being an idiot and slowplaying the flop in position.

Well played imo.

Only thing I don't like - I think you should be opening for 4x, especially UTG, you can go to 3x somewhere between CO and button - although not necessarily.
Every bet you add on any street exponentially increases the amount you can bet on later streets... and when people stack off with tpnk, you want to be able to play for stacks pretty much every hand.
Opening for 3x 100bb deep is good when you want to have more room to maneuver post-flop to outplay your opponents... I'd rather just bet as much as i can get away with though.