information is generally recieved and produced digitally e.g. .pdf .xlsx .doc or even images. for handwritten notes this can be captured as well as a image file and possible via OCR word doc.
for each subject consider logical separation:
- course material - any material given to you consider setting up subfolder for each topic.
- homework - homeworks that require you to write and submit something agai by topic if it makes sense
- supplimentary material- material/notes you have researched as part of your work/revision by topic
- quizes(flashcards)/extra problems - as part of revision you may want to create physical/digital flash cards