QQ 3bet pot ZOOM

PokerStars - €0.02 NL FAST (6 max) - Holdem - 6 players
Hand converted by PokerTracker 4

MP: 107 BB (VPIP: 20.99, PFR: 12.35, 3Bet Preflop: 0.00, AF: 2 Hands: 83)
Hero (CO): 103 BB

SB posts SB 0.5 BB, BB posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has Q♦ Q♠

fold, MP raises to 3 BB, Hero raises to 9 BB, fold, fold, fold, MP calls 6 BB

Flop: (19.5 BB, 2 players) 4♣ T♣ K♦
MP checks, Hero checks

Turn: (19.5 BB, 2 players) Q♥
MP checks, Hero bets 12.5 BB, MP calls 12.5 BB

River: (44.5 BB, 2 players) 5♣
MP bets 30 BB, fold

MP wins 42.5 BB

Hey everyone ! Been a while I've been posting here (and play poker btw).

F : I think it's a mistake not to cBet here as I can value lots of draws. The thing is I'm working on my cBets for 3-4 days, as I'm doing it 75% of the time, which is waaaayyyy too much. So I'm a little confused sometimes
If cBet here and we have 2 blanks turn / river, how should I play it ? B, c, c ? or 2nd barrel, c ?
On this board, it would be someting like bet, bet, bet/F I guess...

R : I'm completely lost on his donk. I feel he can bluff a lot as I showed a lot of weakness. I don't think AK, 2P or trips would donk like that. AJo, AJs+ are in his range so....