Switching to more privacy friendly alternatives - eviltoast

How have others gotten friends/family to make the switch? I’ve been doing a cleanup of my digital life over the last year or so and am trying to move to using more privacy friendly alternatives where possible.

example: I’d love to switch to Signal only but everyone I know only uses WhatsApp. I’ve mentioned switching to people in the past but it’s always the same response (I don’t have anything to hide)