AITA for not wanting to work in order to go on a trip?

My mom just called me and told me that I will be working 4 concessions for my debate team. For more context, my debate team takes trips to different places like hbcu college festivals, south africa, and etc. In order to afford those trips, we do concessions at football/basketball/any event places.

I (f19) get out of school on may 17th (I'm in college) and I might have a job that I would work during the week with weekends free. I also have to take 2 summer classes as well. If i get this job , there will be little issues with my summer classes bc they would let me get off work when I needed to. And I would have weekends free, which I would prefer to have to myself or anything I decide to do. Basically I want to have a say over what I do in my spare time.

Well she just called me to say that I will be working 4 concessions, two on the weekend and 2 during the week. Its for a debate team trip that she is also trying to make me go on. I don't want to go on this trip , nor do I want to work if I'm not going. My mom didn't even ask me if I wanted to go or anything, she just decided that since she wants to go I am too.

But she since she will have less time than me to work the concessions, I feel like she's making me go because she can't contribute to the concessions but i can bc I will have more free time.

I just want to come home and work and get this two classes over with. I also want to my free time hanging out with my best friend and my boyfriend. I've never had much of a social life , always just school and work. Never really hung out with anyone, but now I'm trying to do something new.

But because I've never had a social life, I've always just done whatever my mom wants me to do bc I always have the time and it felt like I HAVE to. But before I tell her I don't want to work concessions or go on thr trip, I wanna know if I'd be wrong to do so in the first place.

TLDR: mom is making me do concessions and go on a trip with my debate team without asking if I even want to. I wanna know if I'd ta to tell her I don't want to.