I use Delta Chat exclusively to chat with my family, I don’t even have WhatsApp installed.

Delta Chat has most of the features you need for communication the only missing thing is integrated calls that cause the phone to ring, which is not a deal breaker for me since I don’t call often, used the jitsi meet integration once with them was a bit messy to get my mom etc to figure out how to use jitsi meet in the browser while explaining via voice messages in Delta Chat, but I think adding integrated calls is in the roadmap