bet flop meaningfully (close to pot)!!! you want them to call "anything" with a strong but vulnerable hand. if the turn was the 9c or something good (not completing a draw), you'll win a big pot by building it early. you just have to get cautious when the draws hit. betting weak with a strong but vulnerable hand, and more when the draw hits is usually not good.

anyawy im not sure about betting or checking behind the turn, but probably check (not many times that worse hands call a bet now but usually better hands check/raise). i'd fold the river.