I'm going to answer this from a parents' perspective because of what I'm hearing from my sons: 2 in HS, 1 in undergrad, 1 in grad.
UNLESS you are willing to be available at ANY and ALL times and will accept part time with NO benefits, they don't want you. My boys hustle. DH and I hustle. You have a full time job and a side gig. You work 3 jobs to make up 40 hours if you have to. Going to college? How many hours in school subtracted from 40 is how many hours a week you can work a job; if the class is easy, add more hours to your work schedule.
That ALL said: you can do this when you have a set schedule. Prior to covid, this wasn't an issue for my sons and their friends (talking more than 10 years since eldest was in HS). Now? Forget it. There is NO WAY you can work and go to college without a set schedule and by that I mean you inform them the days you can't work and everything else is open. Nope, not good enough. Son #2 is working at Diicks. He applied to 45 places hiring in the Tampa area and was called back ASAP but the MOMENT they heard he needed 2 days a week off due to college classes, they ended the interview. Diicks had no issue with it (apparently the manager has 2 kids in college and "gets it") and many of the staff are in college. They have set schedules and when exams hit, the full timers help out by covering those hours so the kids can study and take their exams (and the kids cover the holiday hours so the full timers can have off). THAT'S how you run a business and encourage team-work.
Fast-food doesn't offer a set schedule; most of the mall stores won't; the big box stores don't, Publix doesn't and Costco isn't hiring Part Time where we live. So before people condemn the "young people", understand that many WANT to work but NEED a schedule that works with their classes (high school included). Those with children have it FAR worse not having a set schedule.
*Four Seasons once again*