Do yourself a favor and check out this tutorial, as I am sure it will be quite helpful.
Press/Pull is great functionality, quite intuitive and time saving.
https://www.cadtutor.net/tutorials/autocad/extrude-and-press-pull/
Go to the Tutorials tab on the forum, and watch all of the ones in 3D Basics and you wil be at the head of your class in no time, without the need of your instructor.
Take the initiative and you will be way ahead of your course, and very comfortable.