SH NL50 33-Bluff

Hand converted with online PokerStrategy.com hand converter:

Play hand

$0.25/$0.5 No-Limit Hold'em (6 handed)

Known players:
[tg]BU$52.32:///////;SB (Hero)$61.39:///////;BB$32.29:///////;MP2$55.42:///////;MP3$54.58:///////;CO$51.50:///////;[/tg]

Preflop: Hero is SB with 3:h, 3:c.
3 folds, BU raises to $1.50, Hero raises to $4.50, BB folds, BU calls $3.00.

Flop: ($9.5) 6:d, K:s, 5:s (2 players)
Hero bets $6.00, BU calls $6.00.

Turn: ($21.5) A:c (2 players)
Hero bets $12.00, BU calls $12.00.

River: ($45.5) J:h (2 players)
Hero ???

BU 32/26; ATS 52(BU 43(3/7)); FoldtoResteal 80(4/5)

pre: Normally 3Bet or Fold?! (Here BB is a 53/0-Fish--->I should just call...but I didnt noticed that ingame) I 3bettet because of his high FoldtoResteal-Stat

postflop: Maybe I can just c/f OTF...but is an CBet ok, too? Continuing the bluff on the turned A should be ok. Give up OTR or shove? If giving up...which Rivercard should I shove?