Tangential topic: my wife has been using MacOS for several years now, and she's a non-IT, average "office" user. She kind of struggles with some of the ways in

Tangential topic: my wife has been using MacOS for several years now, and she's a non-IT, average "office" user. She kind of struggles with some of the ways in which you can be really productive with MacOS, and I tried to find a course or something to help her out, but the results are not great. Is there any online resource that you would recommend to help her refine her skills?