Pretty easy, overall.
Especially for people studying medical related courses, I wold strongly recommend this general Biology course. It is basically a summary and an overview of most of the Topics in Biology and Biochemistry.
This learning what you learnt in life science in Elementary school and Biology in high school in 3 months. This brief and not made miserable as the teachers expected in high school
Hours per week:
Advice for students:
well, like they say give enough interest. Since it's mostly revision, you might easily be tempted to skip or it might become really boring since you seem to have already had of most of the topics earlier in life yet not know fully about everything required.