What careers are currently available in the U.S. for medical marijuana, or anything related to the plant?

I was looking up some things on Oaksterdam University, and was wondering exactly how you would get into there, and also, like what jobs are available if I were interested in a career in the cannabis industry? Like as far as running a dispensery, or actually growing and supplying dispenseries. I'm not interested in legal issues im sure I know the jist of that, but like how much of a salary do medical marijuana growers make if any, and how would you go about getting into doing it?