If you want to follow me, I'm moderately active on Nostr, a decentralized social network based on technology similar to Bitcoin, but used here for publishing text content (essentially notes) with optional multimedia content (images, videos) added.
My public key, which is how you find a Nostr user, is
npub17n2m7v30w732zh0uded9ql3mvaws3t6306j0avtvrxjz7lay2n8qa0pnwf by
searching for it on any Nostr client, you'll find my profile. There's no
registration or anything like that; anyone who wants to post on the network
generates a key pair and logs in from any client using their private key.
On a browser, people typically use an extension like Flamingo, which
manages the key and the posts "signed" with it for publication.