Ask HN: How do I learn about Windows licensing?

Windows licensing is really complicated: I never know how much it's going to cost, how long it's going to take, for example, to install Windows 11 Pro on 80 different computers. Or it's not clear what the upgrade path would be from Windows 7 home to Windows 11 Pro. Is there something I can read or a course I can take so I can learn more about Windows licensing?