Welcome to Michigan.
I've been an official in Michigan for 40 years now; and I can say that this state really needs young blood. The link that Rulesman gave you is the first step.
After you register with the MHSAA, depending on where you're going to school, there are some pretty good Officials' Associations around. I'm in the Detroit area and there are four primary assigners who are begging for officials to work Little League, Middle School, Freshman, and JV games. So, the opportunity to work abounds; and as you're a college student, I know how much it helps to pick up a few bucks - as well as the experience.
Outstate, there are outstanding Associations in the Grand Rapids, Ann Arbor, and Lansing area. I'm pretty "tight" with the Football folks at the MHSAA; so I can get to the right people there as well.
I guess there is a way to privately message me on this site. Haven't used it myself; but maybe one of the Monitors can give us both a tutorial. I'd be happy to talk to you and, hopefully put you in touch with the right folks.