Welcome
If you'd like some help about this weird protocol we call NOSTR I wrote some guides here:
https://mikehardcastle.com/
I would start with this one here for some basic concepts:
https://mikehardcastle.com/2024/08/26/nostr-a-social-media-protocol-for-the-next-epoch/
If you have questions, the tag #asknostr is a good place to start.
If you want to write a brief hello, use the #introductions hashtag to allow people to find and welcome you.
Enjoy freedom speech and money.