Hey all, first post here -- pretty much a beginner. I've been thinking hard about this recent hand which sent me reeling a bit. I think I misplayed some of the way through, and especially on the river. Thoughts?

Reads: SB is 18/12 over about 50 hands, not too aggressive after the flop.

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

UTG+1 ($8.55)
MP1 ($10.55)
MP2 ($8.85)
MP3 ($3.20)
CO ($9)
Button ($6.50)
SB ($11.70)
Hero ($8.80)
UTG ($12.15)

Preflop: Hero is BB with 6, A.
1 fold, UTG+1 calls $0.10, 5 folds, SB completes, Hero checks.

Flop: ($0.30) 6, A, 3 (3 players)
SB bets $0.1, Hero raises to $0.4, UTG+1 folds, SB calls $0.30.

Turn: ($1.10) A (2 players)
SB checks, Hero bets $0.8, SB calls $0.80.

River: ($2.70) 8 (2 players)
SB checks, Hero bets $2.5, SB raises to $5, Hero raises to $7.50 (All-In), SB calls $2.50.

Final Pot: $17.70

I feel I should've played the flop and turn harder, and the river blew my mind... anything else?