Ya, fire away. I have ZERO experience with post-editing but am learning the more and more that I read that having the ability to do some 'after the fact' changes to my pictures is going to push me into a different level of ability altogether.
I like the first one the best, it could use maybe little more contrast to me..
also, i'd suggest going back and shooting at a different time of day.. it looks like these were shot mid day-afternoon? try going out at sunrise, or an hour before sunset, when the lighting is nicee and warm, i think it may add a whole different feel to the photos