PokerStars - 40/80 Ante 10 NL (6 max) - Holdem - 4 players
Hand converted by PokerTracker 4
Hero (BB): 12.25 BB
CO: 16 BB (VPIP: 20.00, PFR: 15.15, 3Bet Preflop: 5.00, Hands: 71)
BTN: 40.29 BB (VPIP: 64.84, PFR: 6.90, 3Bet Preflop: 3.33, Hands: 96)
SB: 43.96 BB (VPIP: 32.00, PFR: 8.33, 3Bet Preflop: 0.00, Hands: 25)
4 players post ante of 0.13 BB, SB posts SB 0.5 BB, Hero posts BB 1 BB
Pre Flop: (pot: 2 BB) Hero has T♣ 6♣
fold, BTN calls 1 BB, SB calls 0.5 BB, Hero checks
Flop: (3.5 BB, 3 players) 3♣ K♣ K♦
SB checks, Hero checks, BTN bets 2 BB, fold, fold,
I'm facing two passive players preflop and that continue postflop with some draws. Here i'm oop with a flushdraw and a hand that hasn't showdown value so i should bet first to take the pot, but i'm against someone that don't fold to much on the flop then my fold equity should be less on a multiway pot. One problem is the small stack that i have and my capability to bet on the next streets, so with this in mind should i tend to bet first or check shove?
The way i play was thinking that they might just check and i could see a free card but may be i have to be more agressive in this spots with draws.
Cumps 
What kind of hands or may be boards do you consider to lead bet? My reason for consider check-shove against a loose passive player i could get a free card and one advantage of check-shoving is that i can have more fold equity then lead betting, that's right?