Do you use https://anigma.io or
https://nostr.com to get started?

You can use any client. Other popular options are:

https://iris.to
https://yosup.app
https://coracle.social

You could use Blockcore Notes as alternative, it’s not fully functional yet but working on it every day:

https://notes.blockcore.net/

Start and decentralize your privacity.