You can gain lots of knowledge and experience from working with a trained chef - if you have this opportunity, make the most of it.
I would say that you should listen - listen a lot and pay attention to the detail the trained chef showing you. He knows what to do, and they only want you to be as good as them. Don’t try to be better than you are and don’t try to act like you know everything - every day is a school day, and every day you will learn something new. Embrace it and thank your mentor for making you the chef you are going to become