“You’ve taken your first step into a larger world.” — Obi-Wan Kenobi, “Star Wars Episode IV: A New Hope”
Welcome to Linux Land — we hope you enjoy your visit and get to stay here!
One thing you can perhaps mention — because it might be confusing to those coming from Windows — is that, in the same way as there are different “distributions” there are also different “desktops”. In other words, the look-and-feel of the interface has a number of different styles and functions. For someone used to Windows (perhaps before the current “square boxes” style), then an interface such as the one provided by Linux Mint (https://www.linuxmint.com/) might be a good place to start. Its “Ubuntu underneath” so well supported in terms of applications, but the desktop is perhaps easier to understand and use. Maybe try it and do a follow-up report?