AJs $0.5/$0.10 9 handed. Bad play?

I have no special read on the villain... please correct my mistakes.

PokerStars No-Limit Hold'em, $0.10 BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver Cards)

Hero ($9.85)
MP2 ($4.25)
MP3 ($14.25)
CO ($3.10)
Button ($2.75)
SB ($5.10)
BB ($7.80)
UTG ($4)
UTG+1 ($3.15)

Preflop: Hero is MP1 with , .
2 folds, Hero raises to $0.5, 1 fold, MP3 calls $0.50, 1 fold, Button calls $0.50, 2 folds.

Flop: ($1.65) , , (3 players)
Hero checks, MP3 bets $0.5, Button calls $0.50, Hero calls $0.50.

Turn: ($3.15) (3 players)
Hero bets $1, MP3 calls $1, Button folds.

River: ($5.15) (2 players)
Hero checks, MP3 checks.

Final Pot: $5.15

bet flop, turn, and river

Ok...
Is my preflop bet ok?
Should I bet more on the turn?

2/3 to 3/4 pot sized bets (psb) all the way

id raise to 40 cents, but 50 cents is not horrible

Hmm...
I was just so scared about AK, AQ. Probably would have folded without the flush draw.