How do I stop being afraid to work?

Im starting a new job at taco bell soon. I'll be taking orders and money from the customers, and I'll also be working on the line. I've never done any. I can barely count money. I know they'll train me, but I'm afraid I won't get it and I'll make a fool of myself and get fired. I'm terrified!

How do I stop being afraid to work?
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