first be aware of the difference set/trips. Set stands for combination where you have pocket pair and hit one card on the board. 
For the hand, you have a top pair decent kicker. Opponent limping this deep is probably not very good and could have pretty wide range. Againts randoms, I am donking the flop becouse  they will probably call with wider range than that they are cbeting (this comes from coffeeyay vids). there si a lot of random overs, pairs + draws and worse pairs or seven worse kicker. If he folds his overs you are happy to fold aout his equity share being OOP and could be facing some unpleaant spots on turn or river. You also build the pot to get a bit more value in case your hand turns out to be good. I would probaly bet 25-30 on the flop and something like 89 on the turn, where your hand is most probably the nuts and pair+ draw, or even openenders are calling anyway I think. 
+ for the river play I am still beting. Of course 8x now has a straight but there is no point in being scared unless you get raised. Ehen your opponent sees it the same way as a scary board, you dont get called by a worse hand ones you bet big, your value comes mostly some desperate 5x, 6x  or some nines like stubborn 9T or 69( pair + gutshot). So I bet something like 90 again, You have a chance to get called by worse hands and you only get raised by straights and fullhouses by passive opponent. Even more by beting the river this small you prevent yourself from being forced to guess what do aginst a big bet that your unthinking opponent could made with hands like 69 some of the time. This will not work aginst good players so often but for your bi level this is the play.