What’s your best advise for a first-time waiter job (I’m a little shy)?
You don’t need to be funny, outgoing or especially talented to be a successful server. In reality the answer to your question is quite simple, make your guests experience special.
How you accomplish that can be achieved in many ways. Drinks always full, attention to detail, discussing each dish with enthusiasm, smiling, are all things that help. The best thing you can do is view your guests as guests that just came to visit you in your home. How would you treat THEM?
If your guests leave feeling you made their meal a memorable experience, you will do well.