CryptPad is a free open online document editing system, and a much more private alternative to Google Docs.
It's designed around privacy, with a "zero knowledge" system where no one except the document owner knows what is in a document.
Their site is here:
You can follow them on the Fediverse here:
You can use their service, or host your own instance.
mastodon.at is a microblogging site that federates with most instances on the Fediverse.