Upload & Sell: Off
I am not clear if you are a photographer, or a school organizer for MHSAA. Shooting local sports photos is usually easier, certainly less time consuming, than editing, organizing, and distributing photos. There are a few ways to approach order fulfillment including completed prints available that day. Choosing a means to distribute photos should have been one of the first things settled on to begin the process. I would either hire a proven photographer who is familiar with sports photography, or, if capable, shoot photos yourself and choose a online site that will completely fulfill your orders, including collecting money.
It might be a good idea to clearly restate your objectives, including experience with sports photography and repost it on the FM Pro or Sports Forum.