All villains are unknown so I cant really put them on ranges in this hand .

No-Limit Hold'em, $0.05 BB (7 handed) - Hold'em Manager Converter Tool from FlopTurnRiver.com

UTG ($2.01)
MP1 ($5.93)
MP2 ($4.59)
CO ($4.36)
Button ($5.50)
SB ($2.35)
Hero (BB) ($5)

Preflop: Hero is BB with A, K
1 fold, MP1 calls $0.05, MP2 calls $0.05, CO (poster) checks, Button calls $0.05, SB calls $0.03, Hero bets $0.35, 1 fold, MP2 calls $0.35, CO (poster) calls $0.35, Button calls $0.35, 1 fold

Is this raise big enough ? Should I check here ever?

Flop: ($1.70) 9, 6, 8 (4 players)
Hero bets $1.25, 1 fold, CO calls $1.25, 1 fold

Lead more or c/r ?

Turn: ($4.20) 2 (2 players)
Hero checks, CO checks

I'm not sure if the check here is good . Lead turn ?

River: ($4.20) 8 (2 players)
Hero bets $2.80, CO calls $2.71 (All-In)

Should I bet here smaller or maybe check to induce a bluff ?