Adding Cinemachine - v 2020.3

Documentation says go to

menu - Windows/Package Manager/All
I don’t have all
I can see the packages in my project.
If I hit + near that list I can see 3 ways to add packages

  1. From disk
  2. From tarball
  3. From gitURL
    Now - I can see that Cinemachine is in the registry. But I am not sure how to get it.
    Because I am on a school machine - I can’t access the software part of my C drive - just the user files.
    Running Editor v 2020.3. Cannot update lab right now.