It isn't ready for a "show HN". Global timeline is there for getting exposure. It looks intimidating now, but it shouldn't. Thanks for trying it!

Self-hosting and updating an entire web app is not very realistic these days, but exporting in a ready to deploy site is a feature I'm thinking about. It isn't implemented yet.

I don't want this to have a private mode, everything is public. You can't guarantee privacy these days. My target is more towards what Medium and Svtble are doing, than WordPress.