$2 NLHE 6-max: River shove bluff?

The villain's line is so weak, I'm sure everyone on here will agree with me he has TPWK at best

pokerstars No-Limit Hold'em, $0.02 BB (6 handed) - PokerStars Converter Tool from FlopTurnRiver.com

CO ($2)
Hero (Button) ($3.43)
SB ($7.25)
BB ($5.10)
UTG ($1.51)
MP ($2)

Preflop: Hero is Button with 5 , A
2 folds, CO (poster) checks, Hero bets $0.10, 2 folds, CO (poster) calls $0.08

Flop: ($0.23) 8 , 10 , 4 (2 players)
CO bets $0.06, Hero raises to $0.22, CO calls $0.16

Turn: ($0.67) 2 (2 players)
CO checks, Hero bets $0.40, CO calls $0.40

River: ($1.47) 7 (2 players)
CO checks, Hero checks

Total pot: $1.47 | Rake: $0.05

Now he goes for the donk bet which is obviously mid pair or something near there, so I raise expecting a fold most of the time. Now the turn card is a blank, I know it isn't a great card to barrel on but with a flop raise I figure he probably can't continue with MP if I fire again. He calls and I am torn between going all in OTR and just checking back.

I have no idea where I stand in this, if I had a hand like his I would have given up and I have no idea how much he is willing to call down.....Do I stick to the double barrel an overcard rule? Should I have shoved here?

Any help much appreciated

raise less pre since you dont really have a hand, 6c is fine.
fold flop, you have basically no equity nor fold equity on this board.
as played, check river. this is 2NL. villain is so never folding, terrible turn and river cards to bluff also