I need some advice.

I’m 19F and i’ve had quite a few jobs, 4 to be exact and I live in utah. Most of my jobs have been food related except one and that was at an arcade. i’ve been at each job for about a year and maybe more. and by far this might be the worst job experience i’ve ever had. I had to start paying rent at my parents house right after I turned 18 and this made things difficult because I was only able to find jobs that paid 12-15$. And call me lazy but i’m exhausted working 38 hours a week only for a 700$ paycheck when 500$ of it goes to my mom. I need a job, I can’t experiment because I need to be stable. Here’s where the work place challenges begin. I work at a local “fast food” place and I’ve been making 12$ average 35-42 hours every week. I’ve been at this job for over a year, to the point they even allowed me to have a managers code without the managers pay. To top it off they leave me alone (with one person in kitchen) in the building to up most 2-4 hours. I recently found out that the new hires they hired the last few months are making 14$ and the managers are making 16$ . and i’m still making 12$, My first reaction was “I need a new job” But i’m completely cooked. I have no family I can really network off. both of my parents work at the same place and their job seems great but they’re not hiring right now. When i brought it up to my manager about my pay she said. “they just had previous kitchen experience” and when i told her so did I she just brushed me off. The cherry on top is i’m almost in that building everyday because they need me so much. And when i explained to my manager I wanted a day off he would agree for the upcoming schedule and give me a day off. but the next time I was scheduled everyday of the mf week. I went to the higher ups about it who told me they could get me saturdays off and for a few weeks it was like that until another coworker (who makes 15 an hour) complained how they couldn’t handle being on the floor alone and my saturday’s where almost removed. I don’t know what to do other than getting another job. but now i’m worried things are gonna be worse then this job and I don’t have the room for flexibility. I feel like i keep getting fucked over. any advice would be great on where I couldn’t find another job. I was thinking a remote job because i have a working computer and a good headset. I only have my highschool GED plus my other job experience. I also have a license so i’m not limited locally just having a hard time finding something like the rest the people my age.