Take a look at #Pubky 
before you make a final decision. It has a lot of benefits over Nostr:
- It doesn't suffer from Nostr's relay centralisation issues; it uses Kademlia to create a mathematically perfect mesh network.
- Not necessary to sign every activity with a Private Key.
- Rapidly growing user bade (Nostr has a rapidly declining user base).
- Easier to build on.
There's a bunch of info here:
Pubky App
Pubky App - Unlock the web
Pubky App is a social-media-like experience built over Pubky Core. It serves as a working example on how to build over Pubky Core to create simple ...
awesome-pubky
awesome-pubky
pubky.tech - all directory of pubky resources, libraries, tools and applications