I’ve been on Fedora for a few years now, and been using some kind of Linux as primary for over 15 years. Your experience sounds like something from a few years ago.

If you haven’t tried Fedora yet, I’d highly recommend it over Ubuntu, which is likely one of the bigger cause of your issues.

Easiest option would be to email them to yourself (or use a messaging app that has an option to message yourself)

A Matrix server with a nice web based client, hosted on premise. People are then free to choose the mobile or desktop apps they want.