The PF play is definitely debatable, as you will find JJ to be one of the hardest hands to play. Over 60% of the time a Q, K, or A shows up on the flop, and this is why it's being reccomended that you play smaller pots with it. It's probably easier to just call with JJ at this point, and as you get more comfortable playing it perhaps throwing a re-raise in pf.

I think you bet $10 on the turn.

I don't like the river play because of opp did make a straight, you have a tough call to make with half your stack in the pot. I c/c. What sucks is that a pair of 10s would probably follow you this whole way and spike the straight on the river. Sometimes the cards just aren't polite.