If you have your own site, that link I sent has some instructions for how to set up a NIP-05 id.

You can see mine in action here. If you can add a file like this to your site, you'll be good to go.

https://wisehodl.dev/.well-known/nostr.json

Where that string next to "_" is the hex version of my npub. You can find that value on clients like nostrudel.ninja . Then in my client, I've set my identity as _@wisehodl.dev