I was also inspired by Jane H's avatars, to take the time to resize a cell-phone pic I grabbed of the Chicago Theatre marquee last October. I cut it to fit the noted size limitations, but still cuts off the right side, where the sold out indicator is. It did "fix" itself, when I swapped over to the Happy Birthday pic, but now it's back to being cut off. The joys of forum software....
Resizing in Paint is pretty easy, patty. And Paint is already on most windows systems, and let's you resize to exact pixel requirements, which usually means you'll meet the file size limits, as well. There are other freeware tools out there, too.
Play like you've worked at it, and don't worry about sounding like your influences. You can't cheat on them, or your practice, anyway. If you've worked hard at your skill, your audience will know it.