New Barista Job

New Barista Job Tomorrow I start my first day of being a barista. I’ll only be there for four days, I’m covering for a friend. It’s a really small local cafe and the owner is very relaxed, but I’ll be only person serving. I got some training today but I’m still very nervous about coffee making and of course talking with the customers. Are there any Barista members here or anyone that works in customer service roles? Do you have any advice to manage better?