Write out a schedule to give an allotted time to each one, even if it’s for just a few moments a day. Also ask for help if you need it (clarification, study tips that may maximize your time, requesting an extension if possible).
Hmm..well I usually focus on one subject at a time. It’s easier when you have one thing in specific to focus on instead of five or more. Another thing that helps is having it all planned out, so you could make a schedule on when you are going to do each subject.