Congrats on your first shop! It's so exciting, yea!
Oh my! I remember my first shop. I was incredibly nervous. It was for a Chart House, ions ago when they had the all-you-can-eat lunch bar and you could take your kids. All of the employees did great, although I tend to lean on the positive side like when I didn't really notice the "smile" but heard it on the recording. Not all people smile big and bright when they smile. Oh, those were the days when I really was so excited about my shops. One thing I could recommend is that if you have to evaluate an employee and whether or not they smiled, it's good to smile yourself. People tend to take on a little of their customer's demeanor.