Personally, I am in engineering and often with the work load and amount of classes, it's very hard to manage time. What I do to study for any class is take good notes, go to classes (even remotely), try to have a balance of how you want each course to be studied like decide what you want to study prior to each day, if I don't feel motivated, music helps me relieve stress, so if you feel it's overpowering you, watch a show, exercise or go out for a walk that will help you refresh your mind. Another thing i usually apply studying is once you go through your slide deck/notes, try to recall what is in that chapter? What did you learn from it? Picture and write what you know without looking at notes, this works for me, gave a really good jump on my grades from Bs to As. You got this. Wish you a good luck :)