Selling Sports Photography?

I want to sell pictures of the local little league games. I'm using photoreflect.com to host my images, but I'm only 17. Will i have problems as far a checks/money matters are concerned? Also, will the site provide me with all the information to print out and send photos to clients by myself? I'm shooting with a Canon Digital Rebel xt and I've got an Epson Stylus Pro 3800 on the way. Any suggestions or answers would be greatly appreciated.