University of michigan + scholarship and payment options?

Hello, right now I'm going into my senior year of high school. I have a 4.0 unweighted and a 4.6 weighted GPA. I take part in lacrosse, tennis, and nhs. I also got a 34 on my act and I was told that with my accomplishments i should easily be able to get most of my college tuition covered if i were to go to u of m. No one else in my family has really looked into financial aid and I'm really having trouble finding out how to get money and at the rate I'm going i might only get 2000$ and that is not enough for my parents to be able to send me there. Also, I'm an instate resident so that should reduce the cost. I know it's possible since my friends brother who i have slightly better college credentials than and who also comes from a family of similar economic stature got into u of m while only having to pay 2000$ for his entire first year. finally the majors i plan on going into are pre-med or bio-medical engineering. so any information would be much appreciated.