I'm looking at a number of these, they are all good, but I think I'll make my own. The audience is very much concerned about free speech, but probably not very techical.  I'm thinking something like this:

NOSTR is bringing everybody FREE SPEECH ONLINE.

Nostr is not a company, it is an open protocol that supports censorship-resistant
social media and other interactions over the Internet.

You control your own account (you hold the keys) so you cannot be cancelled and
lose your followers.

Redundant and Dynamic:  It resists censorship because you can post content to many places
and then change where you post at any time without your followers even noticing.

Decentralized: there is no central point for a would-be censor to put pressure upon.

There are already hundreds of apps: chat, blogging, videos, recipes, art, music, and more.
It even supports micropayments!

Here are a few webpages to help you get started:
  https://nostr.how
  https://nostrapps.com
  https://njump.me
  https://nostr.net
  https://usenostr.org