Top two hand 2-4

[JooWish622]

I witnessed this hand
Hero has 600 behind, Villian has covered.
Hero is dealt 69c in MP. 6 handed. EP limps, Hero limps, CO limps, Button folds, SB folds, BB checks. 4-handed.

Flop is 569 rainbow. BB checks, EP bets 12, Hero calls 12, CO raises to 50. What should be Hero's line from here on out?

What if Hero were to raise to 50 initially and get cold called behind. SHould Hero then bet 2/3 pot on the turn, check/call river? What line should he take and why?