Do you have any info on Viber being a bad service privacy-wise? It’s a lesser-known messenger that prides itself on its privacy policy but I can’t find any info on it being the case or not.

I just simply sent a message to everyone I kept in touch on Telegram to switch to Matrix/Element and guided them through the registration to a local homeserver thanks to one of my friends’ blog posts.
The easiest way to convince your friends to switch is to just make the switch and help them sign up and use the service.

It’s completely open and it’s just another fee you can pay. Switch to KeePass if you want restriction-free password management.

This site covers the social cooling effect of these services and how the data you give out may be used against you by banks, insurance companies etc. It’s worth reading through (4 minutes). https://www.socialcooling.com/

Yes, you can set a timer when you want Locus to share the location (every Monday and Tuesday from 8-20 for example, but you can set it to 24/7 if you input the times right).

Did you check out Locus? It’s an end-to-end encrypted location sharing utility designed for decentralized servers running Nostr. It’s free and open source software that secures that your location will most likely never be shared with entities out of your control.