Next biggest challenge, to migrate our family group from WhatsApp to Signal.
The failure chance of this is very very high ๐
Discussion
use Session! https://getsession.org/
First, you take your parents' phones:"Hey mom, hey dad, can I take a look at that?"
Download signal, set it up within 5-10 minutes. Add yourself, send them a message.
Never respond on whatsapp. "I messaged you back on signal. Check there."
This is what I did to my mom to switch her from WeChat to signal with me.