"Nostr onboarding" seems weird. Seems like something that should happen as a side-effect of someone using an app they come across like nostr:npub1eaz6dwsnvwkha5sn5puwwyxjgy26uusundrm684lg3vw4ma5c2jsqarcgz  or someone sharing a link from nostr:npub1jfujw6llhq7wuvu5detycdsq5v5yqf56sgrdq8wlgrryx2a2p09svwm0gx or nostr:npub1wyuh3scfgzqmxn709a2fzuemps389rxnk7nfgege6s847zze3tuqfl87ez or an image from nostr:npub1nxy4qpqnld6kmpphjykvx2lqwvxmuxluddwjamm4nc29ds3elyzsm5avr7.

Maybe a greater emphasis on "login w nostr or continue w new npub" and then a banner or dialog to tell the user they can store the credentials for use again later