i think onboarding should be a lot simpler

- generate secret in the background
- present the user with 'best content' on nostr like flowers, scenery pics, popular accounts
- allow user to browse more hash tags
- if user starts following people then remind that he should backup keys if he wants to continue using this account
- periodically remind to save a username if he hasnt done so
- remind the user to have an #introductions post to be welcomed

i guess this could be called lazy onboarding / gradual engagement / soft signup. the idea is dont overwhelm user with nostr technicalities