This blog posts gives and introduction to Nostr and how to use it: https://blog.getalby.com/how-to-use-nostr-with-the-alby-exte...
It is recommended to managed your private key externally (e.g. with a browser extension) and not hand it over to a Nostr app for signing messages on the network.
My first experiments with the one-shot prompts worked quite well. But they depend on the model probably. Maybe that could be a useful information.