FYI: The following directions are for using Class Notebook on its own, and it DOES NOT require the use of Teams at all.
If you are using Teams for a class and want to create a Class Notebook within Teams then you'll begin the process inside of Teams. (The setup is pretty similar from there.)
Email me for Erin's videos. We cannot publish them publicly, until we remove the student names and data. :) They are also posted in the US Teachers Tech Spotlight Teams page.