Okay, so thanks to Mae and everyone's suggestions yesterday, I practiced a little with LR. Here are some of my first efforts with the original photos on the left and what I've edited on the right. These are just screen shots, so they are not super clear.

Thoughts/tips/suggestions? Sometimes I go back and forth between thinking I've done too much and it looks fake, but then adjusting and thinking it's not enough of a difference. Be honest--if it's too much, tell me! =)