bottom two on btn in bomb pot

Clubgg PLO20 7 handed

Hero (BTN): 100 BB
SB: 108.2 BB (VPIP: 87.50, PFR: 50.00, 3Bet Preflop: 0.00, Hands: 9)
BB: 272.5 BB (VPIP: 29.17, PFR: 4.17, 3Bet Preflop: 6.67, Hands: 61)
UTG: 35 BB (VPIP: 80.77, PFR: 11.54, 3Bet Preflop: 16.67, Hands: 32)
MP: 51.6 BB
CO: 270.25 BB (VPIP: 77.78, PFR: 11.11, 3Bet Preflop: 0.00, Hands: 10)

6 players post ante of 2.5 BB, SB posts SB 0.5 BB, BB posts BB 1 BB

Pre Flop: (pot: 18 BB) Hero has Q♠ T♦ 6♣ 3♣

Flop: (18 BB, 2 players) 6♠ 3♥ K♦

SB checks, BB checks, UTG checks, MP checks, CO checks

Hero??? we always betting here? Or do we check back???
If we are betting, how much are we betting? 1/2 pot?