Since you won’t be starting school until this fall, try to start saving pocket money now (if you’re not already doing that). My daughter had a summer job before her freshman year (last fall) and she saved almost all her earnings to use for spending money. She did blow through most of it her first semester, but she’s learned to budget better now, and she’ll have a work study job next semester. Amazon was her downfall, so we had to have a conversation with her about that.
If it makes you feel any better, we’re not a low income family, but we’ve had to limit our spending due to her college costs - college is expensive for even upper middle class families. She went to a private high school where she wore a uniform, so she didn’t have a big wardrobe of regular school/casual clothes to take to college. We bought her a few additional items before she left, but she definitely doesn’t have the typical amount of clothes/shoes that the average public school kid would and it hasn’t been a big deal. She’s not a real fashionista so it doesn’t bother her - in fact, she’s sends me pics of herself at school and I’m kind of appalled at how ratty she looks sometimes (I know she has less ratty looking clothes to wear), but she apparently values comfort over fashion at college.
One thing we did for her was to fill a big storage bin with snack foods so she wouldn’t have to spend much money on snack items (she lives on campus) - and we were surprised how long it lasted. It included things like noodle cups, cup of soup packets, nuts, chips, breakfast bars, etc. You could probably start collecting stuff for a snack bin over the summer also so you could spread the cost over a longer time period. The same goes for all the other little incidentals you might need at college - try to put a list together well ahead of time so your family can help you buy a few items here and there instead of all at once before you leave. If you have a big family, maybe consider doing a high school graduation registry at Target for stuff you’ll need. I seriously didn’t even know that high school grad registries were at thing, but I guess they are - we had a friend ask us where our daughter was registered, and I was like, what? But even if you don’t do the registry, send out lots of graduation announcements! Graduation is one of the few times in your life when you’ll get showered with gifts - hopefully you’ll get lots of gift cards!
Good luck and like all the others have said, don’t waste time worrying about it - you’ll be fine and you won’t be the only one who will be on a tight budget.