IYKYK

Let me quote the inventor:

"it's not an acronym, it's a word, with an acronym shoved on top of it for increased meaning."

:)

Its not an account, because you are not registering anywhere.

And its Nostr, not NOSTR; why? Because NOSTR is ugly, thats the reason it is a word rather than an acronym 🤷‍♂️

Welcome and good luck :)