Good advice for a pre-med student.

Volunteer at the hospital/clinic starting now till you graduate. Doesn't really matter what, but build up your volunteer experience now. Don't over-volunteer, 3 hours a week on the weekends should do it.

If you want a 4 year undergraduate, take your MCATs summer of 2nd year. Start studying now. Take the MCATs prep course, it's really useful. Med schools look at your 3,4th years and MCATs the most. Don't screw those up.

Shadowing a doctor is more for 4th year and med school. You'll shadow a doctor in the field you want to go into, which I'm not sure if you would really know yet because you're freshman. The more you volunteer, the more doctors you'll know, then you'll actually be able to shadow.

Jam it back in, in the dark.