With the help of others, the previous thread had evolved in a real Mastodon Instructions site.
It's still under construction, but you can still see it here: https://rame.altervista.org/mastostart
Why is this step necessary? mastodon.bida.im might not be the server where you are registered, so we need to redirect you to your home server first. Don't have an account? You can sign up here
mastodon.bida.im