I am a retired attorney. I started working on computers with the original Apple II, that’s almost 50 years ago. I liked getting broken computers to work, and my soldering was pretty good. And now, well, you can’t do that on a cell phone (or anything else, for that matter). I remember setting up email when the commercial internet was starting. First I used the Windows graphical terminal interface for Pipeline.com. Then I learned how to configure an email client under OS/2. K-9 is just as difficult to set up as that was, maybe more difficult.