I've been learning post processing for a couple years now. I've read books, watched videos, gotten online advice (thx, Gerry) and I'm still struggling. Every so often, I have a great leap forward but most of the time, I'm lucky if I have a tiny step toward my goal.
That being said, I have seen gradual improvement in my photographs. At least, I hope this is what I'm seeing. I won't even discuss my keeper rate at this point. It's embarrassing.