Okay, a short thread about how it will work here. I will probably use this space as my personal blog, which will be available at denull.ru.
You can sign up here to make your feed and comment mine, but keep in mind that all your content (including DMs) will be stored on my server. I theoretically will have access to all your toots. So I won't recommend using this as a replacement for a messaging app.
And of course, you can create an account on any other Mastodon instance and use it here.
I am still not sure what to do with other social networks (Twitter, mainly). Either I will export toots from here to Twitter, or vise versa. Or both. Or none — and then maybe I will just merge two feeds on the main page of denull.ru.