I dont think I overestimate peoples technical skills. Just a week ago I had to explain to my university lecturer how to mirror screens and the concept of having multiple screens was just as new as using them for the same thing at once. Thing is that the design for a lot of functions is the same in linux and windows. Some examples: Search menu, right click, desktop, files, drag and drop, task bar and its widgets and application shortcuts. Sure there are many differences too but I would argue that using some sort of app store is easier than finding an executable online. What I want to say is: For very basic usage like using a web browser or searching files you will have the same or very simila patterns between OSs.