You probably want to get into a good pre med school before going straight into med school to take all the prerequisite classes
im not sure about specific collages but i know UCI (UC Irvine) has a lot of medical majors
A Fitbit could possibly help. Keeps track of steps and heart rate
All equally important without physical health having social health might be harder since you might not be able to interact as well because of illness which would then affect mental. Without mental health your social and physical health would deteriorate and without social health your mental then physical health would deteriorate we need a balanced amount of all of these