Just a note to spread the word: Lemmy (for some reason) doesn't have a feature that simply says "This instance has signups disabled." It will still show you the signup page, and it will spin infinitely, but it will never actually go through if the signups are disabled.
You can check your instance here to see if signups are actually allowed:
https://lemmy.fediverse.observer/list
Also, welcome to the Fediverse :)
I'm talking from my own self hosted instance, commenting on something you posted on lemmy.ml, from your account on reddthat.com. It's pretty amazing!
Proof.