Réponse:
For my first day of internship I was welcomed by the manager. He gave us some clothes and then showed me around to explain how it works. At first, I was taken care of by a waiter who explained to me how my day of observation was going. I helped clean the tables as the second day I started working as a waiter. I took orders for food, drink etc. During this service, I played many roles of bartender, chef de rang, rune.
Voilà j'ai changé quelques verbes par des synonymes j'espère que ça te plaira.