You list your location as Florida, big tourist state, so I recommend you get a job in a hotel as a night auditor, working 11pm to 7am.
Hotels are always looking for people to work those night shifts. You might have to deal with a few people, but not many, and not that often. As far as cash registers go, with hotel front desks, it's just a matter of pushing a few buttons on a computer, and not many people checking in that time of night, so you can take your time. Hardly anyone pays for hotel rooms with cash these days anyway.
And because hotels have a difficult time filling those positions, the pay is usually somewhat better, and doesn't require anything more than high school education. It can also lead to a better position within the property.
The audit itself, well it used to involve at least a little skill, but these days they're all computerized systems, again, punch a couple buttons, and you're done in a half hour or less.
And then you have the rest of the night all to yourself. You just have to stay awake, so bring your laptop! Play video games! Text all your friends at 4am! Best of all, you get paid for it!
I worked a night audit job for a while during college -- Lots of alone time to study all night long! And play video games, while texting my friends at 4am. good times, good times...