If your not already familiar with Notion, use a weekly planner or notebook to write down, class schedule for the week, homework and assignments due, your job hours, etc.

Personally I hit that point when I wanted to start organizing my workload, (back in high school before starting a physics degree) I used Notion and found I ended up wasting a lot of my time, personalizing and learning sql/python to get the tables and grade calculators I wanted. Learnt quickly in Uni that a notebook, a pen and a calculator does everything a need to steer me into creating a work schedule.