2 more heads up, oop hands

[yukoncpa]

Thanks Shaundeeb and Habib for help on my other questions. I’ve got just 2 more, then I’ll quit asking for the day. 8 handed tight 2 -4 limit O8.

Hand 1
I’m under the gun with KK23 double suited to the Kings. I open raise and am called by one person, both blinds fold.

Flop is 5TJ ( rainbow ) I bet, opponent calls
Turn is 8 ( board is still rainbow ) I bet, opponent calls

River is 2 What do I do? Should I have even played this preflop? Maybe limped preflop?

Hand 2
I have A59Q rainbow on the BB. One early limper, everyone else folds, I check. Small pot, I’m oop, heads up.

Flop is: A5J with two clubs. I bet my two pair, opponent calls
turn is: 9. I have three pair. I bet, opponent calls ( no flush is yet possible )
river is K ( no flush possible ) what do I do?