This is just my opinion and I'm sure folks will disagree, but if you have a lot of time to kill, I'd recommend mixing up shadowing with hands on clinical volunteer work.
Shadowing a doctor is great, but the main thing you learn is what a doctor does. Med schools like it because it shows that you'll have a good idea of what your chosen career path is really like.
But good clinical volunteering is hands on. You have duties to perform that you are responsible for and many times you're working closely with patients. Also importantly, you're contributing to the process rather than mostly observing it.
Don't get me wrong, shadowing is great, but rather than 200 hours of shadowing, I'd lean much more towards 50 hours shadowing and 150 hours volunteering. Just my $0.02.