I made this relay: https://lockbox.fiatjaf.com/
Anything you publish there will only be shown to people you follow (they have to perform AUTH before reading).
If you add it to your NIP-65 list of "w...
I like this. I know it'll take some time to gain footing, but I think this will alleviate a lot of concern for many. One the few endearing things about FB is the ability to expand and contract one's reach, without needing to be in some secret club or topic oriented group.