Shit man, I feel so bad for people going back to school, especially college and uni kids bc supplies and textbooks alone are expensive as fuck and thats a shit ton of money to drop right at the beginning of a semester.
Like legit, I bought all my textbooks for first semester, cost about like 500 dollars ish? and never used any of them. Like, barely skimmed them for reference occassionally. I blew through the last 3 semesters of my program without buying a single textbook. I would borrow from classmates or dish out a couple bucks to photocopy some pages from their texts. Much cheaper, and keeps you from trying to over study all the other information that you dont need to focus on.
Or, my other method is to buddy up with a classmate during your first semester, preferably someone you’ll spend a lot of time with, and then for the rest of your semesters, each buy half of the books and share them between the both of you. This also helps because it kinda forces you to group study! Which I find keeps me on focus, because on my own I tend to prorastinate a lot.
Also selling your previous semesters texts to new students in the progam for a discounted price will help make you some of that money back. A lot of school bookstores will also buy books back too.