Need job advice ASAP PLEASE!🤦🏼‍♀️🥴🤷🏼‍♀️

I’m 17 and my current job is working for a law firm as their courier. I go in around 2 and we close at 5 open Monday-Friday so I don’t have to work any weekends. I love that part of it, but I hate the job itself. I hate driving around and feeling taken advantage of when people make me wait an extra hour before I normally leave which puts me getting back right at five and leaves no time for me to do dishes, and then they get mad. I dislike everyone there but two people who actually seek to respect and care about me. I recently applied to dunkin and was told I got the job, but now I’m struggling to make a decision and put in my two weeks notice. I’m honestly scared to start working shifts, which will sometimes be late and closing shifts and then working on the weekends. Also the people in there are ghetto as fuck, and not the funny ghetto, the immature and obnoxious kind. I’m not being rude but while I was sitting in there waiting to be interviewed one girl was banging on the bathroom door yelling to someone in there “unlock this door before I beat it down hoe” multiple times. I’m not sure what to do and it’s hard enough to find a job as it is. I don’t want to miss my one chance out, but I don’t know if it’s completely worth it all. The manager told me she understand high school students and try’s not to work them much on the weekends or give them closing shifts, but that doesn’t mean I’ll never been working late. I’ve listed the pros and cons in my head for two days now and have nothing. What do you guys think?? I’m just so frustrated with this whole job situation and have no idea what to do😣