You can also get free NIP-05 short name alias (like: cryptonymous@BitcoinNostr.com) here:

https://bitcoinnostr.com/

If you have any trouble with setting it up you can contact the server operator: 

@npub128q9nu7vrqpfjllpcnnq6cc4cgs8ngp9sge9v9s2c7lur098ctts99gupa