I felt sortof the same as you when I was in college all I wanted to do was work on cars. I started working at an autoparts store and learned I really hated it. Now I just work on cars for fun in my free time and on my friends cars with them. You can learn alot by just jumping in and doing the projects you want to do on your own car. Get a full service manual and buddy up with someone else who likes to work on cars.