My POTS speciist recommended reading "The Dysautonomia Project- understanding autonomic nervous system disorders for physicians and patients" This was the most helpful thing ive had since diagnosis. Theres nothing more important than understanding the condition and how it relates to you specifically. The book talks about drinking water, eating salt, using compression gear, etc, and why they help the symptoms.

i recommend referring to a dysautonomia specialist, (if you haven't already :D), and asking your college for accommodations. (like; a dorm on the first floor or second floor (no stairs), freshman don't usually have dorms but if you do, idk this one might be weird but i just ask my teachers if i can lay down in class.. lowkey very helpful. ask to be able to eat salty snacks in class, always have access to water, if you're giving a presentation to be able to sit while doing it. chairs during standing classes, (like if you're doing something with engineering and you might be standing? idk something like that) pay attention to the details about what you'll be doing & plan ahead :D)