TIPS FOR WORKING IN FOOD SERVICE

So I just recently have had the opportunity to get a job in an ice cream parlor. I’ve never had a job before and the place is very beginner friendly and I live very close to it so it was a perfect opportunity to get experience in the work field( plus I can get good cash) Now keep in mind that I am very introverted and social anxious, I’m not very good at talking to strangers and i have borderline social anxiety. I know that this job is a good opportunity to step out of my comfort zone and get good cash, but I am still very nervous to interact with the customer. Are there any tips for handling customer service when being introvert and socially anxious?