I wouldn't bother. you learn more in a hours lecture than weeks of school lessons. Depending on your coure, you might have lots of lectures. Yes, medics are sponges, assumed to be able to just absorb information. I wouldn't bother doing any work before you have to - for a fair majority this means weeks before exams.
I would read something you enjoy - plenty of awesome fiction books out there.
Oh and don't worry, everyone adapts to the workload absolutly fine, in the people that don't, its not because of lack of ability, more usually lack of effort.