I have no idea what I'm doing. Returning to school. Feel like I'm drowning day 2.

I've always done exceptionally good in school, but I've started a new major in a field I have very little knowledge about. While I am versed in one specific area of it (genetics) and interested in the general concept of medicine, I'm going into a major I know nothing about and even the basic beginners classes I'm in are starting to freak me out.

It's been a few years since I've been in school and I have no idea how to take notes these days. I feel like they've thrown so much at me just on week one that I am drowning.

Any advice on task priorization, studying, etc? I'm 30 years old, you'd think I'd have this down by now!