[Closed] NL10 SH, KT in SB, 2 limpers, turned 2nd nut flush

Hand converted with online PokerStrategy.com hand converter:

Play hand

$0.05/$0.1 No-Limit Hold'em (6 handed)

Known players:
[tg]BU$10.21:///////;SB(Hero)$11.80:///////;BB$14.88:///////;MP3$18.81:///////;CO$10.22:///////;[/tg]

Stats (VPIP/PFR/AF/Hands)
CO - 48/5/1.0/23

Preflop: Hero is SB with T:d, K:h.
MP3 folds, CO calls $0.10, BU calls $0.10, Hero raises to $0.55, BB folds, CO calls $0.50, BU folds.

Flop: ($1.4) J:h, T:h, 9:h (3 players)
Hero bets $1.00, CO calls $1.00.

Turn: ($3.4) 4:h (3 players)
Hero bets $2.00, CO calls $2.00.

River: ($7.4) K:d (3 players)
Hero bets $3.50, CO raises to $6.62, Hero calls $3.12.

Final Pot: $20.64.

Hi,
Is it too loose to raise from SB to steal limps with KTo? Maybe it would be better to complete or fold preflop?
Postflop, should I slow down somewhere? Can I be sure at any point that CO has A♥ and fold my hand?
Also, I probably should've bet flop bigger, didn't notice it was connected as well as single suited...

Thanks!