It has been a long journey.
I have been gradually convincing my family, close relatives and friends to make the switch to Signal for over two years. I am already the “tech support guy” in all my circles so most didn’t really question it. Most of my friends are quite tech-savvy, and some even did use Signal before I talked to them about it.
This also filtered out some “friends” who were never that close to me to begin with. So, that’s a bonus, I guess.
Overall, my recommendation to others interested would be to tell people how much you don’t like Meta’s business model instead of the privacy aspect. I already ditched Facebook and Instagram many years ago, and this helped defend my point a bit better.
I’ve done it quietly 4y ago, only told some closer relatives. It was kind of funny when relatives I wasn’t talking to told my closer ones that we were keeping in touch on WhatsApp, not even aware I wasn’t in the platform for over 6 months at that point.
Now after years and leaving 2 family groups, politics, and a whole lot of drama behind, I feel it was a great decision, and the only regret was not doing it earlier.