Had my first day and I want to quit

I really wanted to listen to the people that told me to be positive. I was really excited at first but after my day I'm kinda terrified at the kind of people I'll be dealing with at work.

I will be a legal claims specialist for mental health/probate. It's a mixture of doing work at your desk and sometimes rotating to work the windows to help people with forms. I feel extremely stuck since I just got this job and I wanted this to be my career 😭I wish I was mentally stronger to deal with people screaming at me