I'm a nurse clinician and charge nurse at a level one trauma hospital.
Day to Day
Every day is different. My days typically start with a shift huddle which is a meeting between all of the nurses, the charge nurse, and our manager to go over the status of the department and our roles for the day. I care for a mixture of medical and trauma patients with interesting and complex medical situations. Some days are really busy and others are calm, but I have to be ready to go at all times.
Advice for Getting Started
Here's the first step for high school students
I would recommend you take your time in the beginning to choose your major, so that you don't waste time later. Explore your options (they're endless!). Shadow a professional for a day or two. See if you can see yourself in their shoes.
My career is related to what I studied. I'd recommend the path I took: