I marked out what I was thinking during the hand itself.

Hero (Button) ($4.31)
SB ($2.79)
BB ($1.09)
UTG ($6.50)
UTG+1 ($1.67)
MP1 ($1.40)
MP2 ($0.88)
MP3 ($2.57)
CO ($1.22)

Preflop: Hero is Button with J, 10
1 fold, UTG+1 calls $0.02, MP1 calls $0.02, 2 folds, CO bets $0.06, Hero calls $0.06, 1 fold, BB calls $0.04, UTG+1 calls $0.04, MP1 calls $0.04

Maybe not the best preflop call, but I presumed I had good implied odds, and I was IP against 2NL fishes.

Flop: ($0.31) 7, K, 7 (5 players)
BB checks, UTG+1 checks, MP1 checks, CO checks, Hero bets $0.20, 3 folds, CO calls $0.20

I figured it was a risk worth taking to stab the pot here, since I could take down the pot here, or build the pot for later if I hit. Since CO called and he's the PF raiser, I put him on Kx/AA/A7/KK/AXdd, of which we will be pretty much drawing dead only against KK and Axdd. Is this fine?

Turn: ($0.71) 9 (2 players)
CO checks, Hero checks

This card gives us ~13 outs, but checking back seemed safer since I didn't want to risk CO shoving into me if I bet. (Afterall, we already established that CO has Kx/AA/A7/KK/Axdd, of which we will be pretty much drawing dead only against KK and Axdd - apart from the straight.)

River: ($0.71) 8 (2 players)
CO bets $0.20, Hero raises to $1, CO calls $0.76 (All-In)

And I hit! This is a super standard shove for value, given CO's short stack. We can only lose to KK realistically here.

Total pot: $2.63 | Rake: $0.13

Any other advice for any street apart from PF? Is this not a super standard stack off? Thanks.

Preflop is fine, although I'd prefer deeper stacks.

On the flop, you've assigned far too narrow a range for Villain. What about 67/78/79/A7/88-QQ? What about the kind of hands like AQs/66 etc that a 2nl Villain simply can't bear to lay down on the flop after raising preflop? For some reason you've decided that his c/c on the flop is purely only with hands that he's slowplaying for value.

Okay I widened his range. Whichever the case, the flop bet is fine imo, isn't it?

In a 5-way pot at 2nl, I think I'd be more inclined to check back on the flop. You're just going to get called/raised way too much, and against these players and with these stack sizes, it's not going to be a problem building the pot when you hit anyway.

Multiway pot, you are given an opportunity to see a free card whilst drawing, so checking back seems a correct move.

But somehow I also like the flop bet - you managed to fold out 3 people, and against one opponent you stand a little better chance to win even if you do not complete your draws, but instead hit one-pair with a J or 10, and villain has something like AQ, AT, 66-99 or other small pocket pairs that he couldn't fold. Of course, you might have got called by all of the opponents, but that builds the pot in case you complete your draws. If you get check-raised though, you have to fold probably, but a check-raise here would most likely be a slowplayed monster (like flopped trips or a full house), and you don't mind that happening on the flop rather than putting in even more money on later streets.

It would be interesting to hear more opinions on this

Yup that is exactly why people are betting with draws against calling stations, or fishes in general (except aggro donks). By building up the pot, when I complete my draw, fishes and regs won't be able to fold because of the good pot odds they get when facing a river shove. SPR! It's -EV if we don't hit, but since I have no idea how to do the math, in the long run I would say that this +EV.

Although this is against a 2NL fish, I was assuming that a 7x wouldn't be raising pre (except 77, that is), but that's not the issue since I completed my hand, and a fish with 7x isn't going to lay it down anyway.

Thus, I figured I was only up against KK, since AXdd didn't complete his flush as well. Seeing the weak bet on the river, I assumed it was CO's thin value bet with Kx or something. FWIW, nearly all the time he has Kx. (Well if it's really KK I'm just gonna shrug it off as a poorly-played cooler)

As played, I shipped it in, standard. I don't suppose I was expecting to be beat in a hundred years.