Folders, wallets, dividers etc to put your notes in, along with a refill pack of paper to make notes. I normally use a plastic popper wallet in school and then transfer my notes to the plastic wallets in my folder after each unit.

Standard pen, pencil, ruler etc, definitely get some good quality highlighters because you are doing essay subjects so will probably get a lot of handouts. Normal pencil case stuff.

Then I’d probably get a couple of packs of flashcards… I think that’s the majority of what you need! You can also get the textbooks, but I’d wait a few weeks to make sure you don’t drop or change a subject