Trying to work on my blind play. How's this line? Am I folding too much? Felt like QT on the river but I failed to realize he would've caught up on the turn.

Villain is 40/10 with Attempt to steal blinds=7.6%

Ultimate Bet No-Limit Hold'em, $.25 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

Hero ($25)
UTG ($54.28)
MP ($26)
CO ($12.36)
Button ($8.16)
SB ($20.19)

Preflop: Hero is BB with K, J.
4 folds, SB raises to $0.5, Hero calls $0.25.

Flop: ($1) 3, 9, J (2 players)
SB bets $0.25, Hero raises to $1, SB calls $0.75.

Turn: ($3) 8 (2 players)
SB checks, Hero bets $1.5, SB calls $1.50.

River: ($6) K (2 players)
SB bets $6, Hero folds.

Final Pot: $12