First warmup in forever, big hand early

[ChrisA3]

I have sat out for the first ten minutes. Played one Hand vs Villain where I raised QJo in LP, Villain calls from BB,
bets T84r flop, I call, makes it a little less than 2/3 PS on the 6 turn, i make a loose / bad call River 2 goes check check and AJo is good.

PokerStars No-Limit Hold'em Tourney, Big Blind is t100 (9 handed) Poker Stars Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

saw flop|<font color="#C00000">saw showdown</font>

UTG+1 (t10800)
MP1 (t19025)
MP2 (t9645)
MP3 (t9520)
CO (t9550)
Button (t10725)
SB (t9475)
Hero (t8850)
UTG (t11860)

Preflop: Hero is BB with Q[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/spade.gif[/img].
<font color="#666666">3 folds</font>, <font color="#CC3333">MP2 raises to t300</font>, MP3 calls t300, <font color="#666666">1 fold</font>, Button calls t300, SB calls t250, <font color="#CC3333">Hero raises to t1800</font>, MP2 folds, MP3 calls t1500, Button folds, SB folds.

Flop: (t4500) T[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>

Hero feels totally lost and doesn't know what to do.

1) Preflop Raise size is good?
2) How do you play the flop? Villain in Question is Alphawice. Such a sick spot imo.