bvb vs nit

Villain is an uninspiring 14/10 over small sample. This is the first session I've played with this guy and I have an absolute clean image. Being a 14/10 his image is obviously clean as well.

Pre flop is good or bad?
I think flop and turn are good cause his range is a lot of pairs +diamonds but is the river bet is too thin and hows the bet size?

PokerStars No-Limit Hold'em, $2 BB (4 handed) Poker-Stars Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

UTG ($115.40)
Button ($241.50)
SB ($211.10)
Hero ($250.45)

Preflop: Hero is BB with A, J.
2 folds, SB raises to $7, Hero calls $5.

Flop: ($14) 7, A, J (2 players)
SB checks, Hero bets $10, SB calls $10.

Turn: ($34) K (2 players)
SB checks, Hero bets $24, SB calls $24.

River: ($82) T (2 players)
SB checks, Hero bets $40

fine up til river which is too thin. the only worse hand he can ever have that calls is a10.