I was a cashier at a Pizza Store. It was an easy job to get and not too bad. I would have rather been just a bagger or something so I didn't have to deal with customers though what do you think
A job is a job at the end of the day my friend, some people struggle getting job (like my self) but all you can do is keep trying.
Studying while you work at the pizza shop might be a good option for you for future career.