37/26/17 over 30 hands, already seen him call 2 3bets oop. Not super comfortable in pots like this though. Thoughts? Is this standard? What line would you take in this hand postflop?

You are value cutting yourself by not including all player stats and flop stats(yours and your opponents), because in general these stats can turn a hand from a shove to fold or whatever, etc. This limits analysis.

From the info given, this is how I would play the hand:

PF: I would raise to 1 as my standard 3bet, maybe more if we were deeper.

Flop: I typically bet slightly more than half pot, so that would be 1. However, I find at low stakes, sometimes slightly bigger cbets get more fold equity because weaker players read more into bet sizing instead of ranges. At higher stakes(.5-1 through 3-6), where people think about ranges, my standard sizing is very slightly more than half pot, maybe more if we are deeper/certain boards/hands/opponents.

Turn: As a standard I'm typically barreling here, simply because his flop calling range is going to be fairly weak and scared(another benefit is we are harder to play against/more balanced). Of course this opponent specific, if you have 0 fold equity, betting is counter-productive. Again, I'm going for a half pot or whatever size sets me up for a river shove. Checking is fine, especially if you suspect a turn CR-shove(which is awkward for us).

River: His bet is so weak, this type of player could also float the flop with Ax, hearts, maybe some overs or pure trash. He could also have 2x, 7x, or a PP. Look at his flop stats to get a feel of his range/floatiness/thought process.

If my math is correct, we only need to be good here 18% of the time to breakeven. So, good call.