[reificator]

You said you're 18, you're young and hopefully don't have kids, so apply in other cities as well.

Yeah it's scary. But if the job is good enough, and the pay is good enough, then you've got to figure out why your bullshit reason for staying where you are outweighs both your mental health and your career prospects.

EDIT: And don't forget remote options.

[shantly]

God, at 18—or hell, at 22—showing the fuck up and not seeming entirely incompetent is a big deal. Show up, be engaged, do both consistently, and anyone who's not a total piece of crap will be all over giving you more responsibility and mentoring you up to bigger and better things. Total pieces of crap may still be interested, but it'll be in exploiting you (as in current situation). Oh, and ask questions. No one expects you to know diddly-squat, so ask away. Ask about stuff that's not part of your job description at all. People will tell you all kinds of stuff, and, incredibly, the whole exchange will make them like you more.

Phenomenally small amounts of give-a-shit go a long way for youngsters. It's basically their superpower, if they're willing and able to use it.