How do I get a job as someone in hs

You're going to need to find a mid tier demon to enter into a dubious contract with. It's the only way in this current economy. I've heard of a necromancer named Gary located in Arkansas who can get you in contact with the lower dimension, but after that you're pretty much on your own.

Otherwise it's very tricky, especially while in high school. Consider gig work at your age. Giving guitar lessons, purchasing and delivering groceries for the elderly, furniture assembly, etc.

Otherwise, definitely consider the demon approach. Fun fact, Beelzebub is currently doing a pretty nifty soul leasing system that is revolutionizing the demonic contract field. Kinda like a time-share but for your eternity. Definitely a more pleasant option than trying to get hired through the internet