1) Theres a ton of weak pairs that you will get value from if you bet the river. You should always be betting for 3 streets of value with tptk at these stakes.

2) I don't mind that you didn't raise the flop but you have to raise the turn. You have so much equity here that you should be raising for value. The way you played it you should be raising the river for value since you took such a weak line.