Plan accordingly
That is what they tell me anyway.
Preparation, exposure, knowledge, all good things
See, I'm not sure what knowledge and preparation you would get from many shadowing experiences. In many contexts, sure, you'll see a physician speaking with a family, doing an exam, and coming up with a plan.
But the actual heavy lifting here isn't what you can necessarily see. It's thinking through disease processes, going through drug mechanisms in your head, weighing pros and cons of various testing with different sensitivities and specificities. It's these sorts of things that allow the doc to answer the family's questions and make the plan. And unless the person you're shadowing has a bunch of time to explain these things, you may as well have watched an episode of Grey's Anatomy. Plus, many of us do not have much experience in explaining this stuff efficiently to someone who might not have taken intro biology yet (this happened the other day).
Not to mention that, as others have said, it doesn't really "look good" to so shadowing at this point- I've helped with admissions on the med school side, and we are much more interested in someone with actual passion for something (teaching, cultural studies, whatever), than some number of hours logged shadowing in high school.
At this stage of the game, I would recommend using your free time to do something where you can actually contribute in some way, and get exposed to a variety of human interactions in the process:
- Working a job with any amount of human interaction. This includes becoming some sort of tech (or translator!!) in college, where you can kill 2 birds with one stone and earn some money
Be a ski instructor. Anything like this will likely build maturity and teach you to deal with difficult personalities.
- Volunteering in *anything* which interests you. If you're actually passionate about it, this can be a wonderful conversation to have during an interview later. Helping kids repair computers, tutoring in prison, even newborn nurseries will often have volunteers around as extra hands to feed babies.
- Leadership in your school. Take charge of something, follow it through.
These are just my thoughts as someone who was once in high school, did admissions in medical school, and is now a resident. The way I see it, your time is precious, try to make your experiences high yield!