>>1545126Assuming you go to every class and pay attention, take notes, etc. You dont need to study long hours.
Consistency is all. You can easily get by with just 3 hours daily.
There are also active recall tools like Anki that allows better retention and efficiency.
I would advice you to use said tools, once you start using it, it becomes a matter of inputing your material and doing your cards. The program will tell you what amount of cards to do. For example you might have 100 review cards to do per day.
Without Anki or an active recall system, estimating how long you should study because you dont even know what the retention rate is.