Look, guys.I don't know anything, but I'm a writer who was trying to use twenty fourteen and wanted to change colors, too.I also didn't understand about the features. I found a child theme of twenty fourteen hear on WordPress where you can change the colors in customize. It's called Anjirai. I'm still working on it, but at least the black is gone and I'm figuring the rest out.
Also, until you put those pictures in on the featured pages or featured posts they don't show up, but when you have 3 pages done they drop into place. The picture size is really important though.
I hope this helps. This is truly the blind leading the blind, but I think it will be worth learning more. ON TO FIGURING OUT HOW TO CHANGE WIDTHS!