I got a job at taco bell, and I think im going to work the cash register. Im freaking out. Should I tell my boss?

I went to an interview today and he hired me on the spot. I got an email saying im the service champion. From my understanding I will be working the register and taking orders. I'm not good at talking to people really, and I'm terrible with counting money. I'm thinking of asking my boss if I could just work in the back making food. Should I ask him?

I got a job at taco bell, and I think im going to work the cash register. Im freaking out. Should I tell my boss?
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