So I have found a picture that I love and represents the beginning of my story and essence of my character. However, I don't know how to go about getting the rights to it. Creative Commons doesn't allow me to use it, right? If I get a designer (tips on who, where, how much, expectations and protocol??) to create something similar, do I have to pay them a percentage of sales if the book sells? Or do I own the rights to it? Thanks!