Congrats on your efforts so far! This looks extremely user-friendly and well-designed, which is likely to win over many new users:)
I especially love how it feels very much task oriented, showing or hiding only what is necessary in each context. Even something as simple as using a letter icon for DMs feels just right. Everything feels as though it's where it should be, and that is from playing around with fresh eyes for less than 5 min.
Do I understand this correctly, that it can either be used as a contained community or it can connect to the wider fediverse, like Mastodon?
One last thing. I would be great if possible at one point to make a package available for #yunohost which would make self-hosting a much easier proposition for non-technical users:) It makes installing most apps a one-click affair https://yunohost.org/en/apps?q=%2Fapps