My wife is not good with computers. I moved her over to Linux with vanilla gnome. It took one 1/2 hr session and she was off and running. The next day I got a bunch of questions - another half hour. About a week later she said “this is SO much better than windows - I love it!”

Linux is easy to use. Installing and maintaining-no. But using - yes.

how to change mouse sensitivity in Linux

They don't need to understand DEs or any of that. Press Super ("the Windows key") and start typing "mouse". Please teach people how to use PCs properly; this is the fastest way to access any program or setting in both Windows and popular DEs: Cinnamon, KDE, MATE... Windows will even happily send anything you type here to Bing for easy web search by default 😑