I'm a PLO n00b and new to this forum as well. I'll probably make a few posts here in the next couple of months while I muck about at tiny stakes to get a grounding with a view to moving up and making it my main game sometime next year. So please be rigorous in exposing any fundamental mistakes I make.

Onto the hand then (btw I couldn't make the separate boxes work so it's all coming here).

14 hands on BB and he's 71/36 with AFactor 1   CB 0/2  FvCB 0/2

Hopefully pre is standard although is there any merit to making it smaller oop 200bb deep?

Flop- c-bet for value. Could go bigger but I've tended to be c-betting around 2/3 pot. Any rationale for different flop sizings?

Turn- I'm guessing he folds a tonne when I bet here. At the same time I know that I would have loads of things I would want to stab with in his spot like missed FD, Kxxx and some boats. Given his low aggression over a tiny sample my line may be bad compared to betting twice and hoping to get called by pocket pairs when he has them. I am planning on checkraising as I wouldn't really expect doublebarrel bluffs or particularly thin v-bets on the river.

River- After missing the checkraise just try to get some value. When raised I guess he slowplayed kkk77 or caught 99977. These hands presumably being in his check behind turn range I guess should incline me more to betting the turn. Thoughts on the 3-bet sizing? I was really guessing at what didn't look the most ridiculously strong (despite my line) and got decent value if he was the type to just snap with the hands mentioned above.