Learning takes time. You will be reading online textbooks, watching & listening to lectures, completing assignments. You will need to spend 4-5 hours working but it does not matter when you log those hours. If you don't like mornings, you can do your work at night. In fact we have online students logged in from 8:00 pm to 1:00am!
Just as in regular high school, some classes are easier and take less of your time while others are harder and you have to spend more time, the same is true in online courses. You may be able to complete assignments in some courses in less time. Others may take more work. The 4-5 hours is just an average of what we see our successful students doing.
WILL YOU SPEND 4-5 HOURS EACH DAY WORKING ON COURSE WORK?