As far as convincing normies I've had limited success (still working on it) getting them to use Delta Chat, just due to the easy onboarding, just pick a name and go, no password even. Got a few on it including my mom who cannot computer to save her life.
So far the holdouts are a few people of the "I don't want to download a free app, you should spend a fucking grand on an iPhone so we can use iMessage" opinion (literally), and, idk I'm working on it but for people that out of touch and stupid there may be no hope except to be mercifully euthanized.