I'm really bullish on nostr: https://krisconstable.com/check-out-the-nostr-protocol/

If nothing else, know these two things:

1) It's a decentralized protocol, not a company or app -- there are man different clients that do completely different things on nostr, try them all and see which works best for you.

2) Unlike Twitter and Mastadon, the relay admins can not read your private DMs.

If you want to generate a key pair, including a vanity one, and/or know how to NIP-05 validate it, to use nostr: https://krisconstable.com/generating-a-key-pair-with-nostr/