Give your mam Deltachat, it uses good old email. It was a miracle for me, so that with people friends that didn’t want to use xmpp or matrix I just use email thanks to Deltachat. Some of them even installed it and like it so far. Everybody has an email so I can reach plenty of people with DC.
Yes, I remember my Motorola Defy. I even accidentally tested it in my WC :P
Oh my god, do I have to resign from another one corporate shit just after reddit? :)
It is difficult. Using corporate technology is easy and addictive. Not everybody is strong enough to escape from this comfort.