I’d suggest one of the fedora atomic installs, maybe even get a couple renewed Thinkpads all set up, one with kde and one with gnome and let them play with them for a few days. I was the only engineer in my company that ran Linux and the bosses only concession was that I carry a windows PC too when he was onsite with me so he’d understand what I was doing, but he provided a nice one for me so I never complained.