This mastodon instance is not open to the general public. Its my personal play-thing. If you know me, contact me directly and I can hook you up with an account. Otherwise, I'd look to https://mastodon.online/about or https://noagenda.social if you know what No Agenda is.
You can follow and reply to me from any mastodon account on any mastodon instance.
geekstream.org is the personal mastodon instance. It is not open for mastodon account registration.