I keep clicking around, but can't find how to properly start.

What I'd like is a CLI utility (preferably in Rust, or available in NixOS) that I could use to generate the key locally. Then I can put the public key in https://branle.netlify.app and sign my posts from CLI, I guess.

Could I maybe use my pgp on a yubikey?

Please excuse if this is not the best place to ask, and thank you.