Cannot create an account - "unsupported account name"

[NuclearManD]

Hello,
I'm most likely just not following proper rules for creating an account name, but I haven't found any rules other than that it must be 12 characters (and not even sure if that is correct).

There should be a more straightforward way to create an account name, and at the very least an explanation as to what the rules are.

Here is what I have tried:

No underscores one number:
curl http://faucet.cryptokylin.io/create_account\?nuclearmand0

Started with a number:
curl http://faucet.cryptokylin.io/create_account\?0nuclearmand

Tried more than 12 characters and an underscore:
curl http://faucet.cryptokylin.io/create_account\?nuclear_man_d

Tried for uniqueness:
curl http://faucet.cryptokylin.io/create_account\?nuclaerc7db0

All I get the same response:

{"msg": "failed, unsupported account name '[tried username here]'"}

I found a reddit thread here which suggests that I have to pay for a name in EOS (probably test EOS on the testnet?). I'm very confused because, from what I can tell, EOS works very differently from cryptocurrencies like Ethereum or Bitcoin which have ECDSA private keys, no account name, so you mustn't pay for an account (even if it must be funded once existing). Perhaps there is just a lack of straitforward, surface-level documentation? It's odd because it seems that I need an account name to develop on EOS, and the wallet to do anything on EOS.

Note sure if this issue is the best place to put this, but this seems to be pretty absurd. IMO this should not be a problem; at least it should be explained somewhere.

[RedCuckoo]

For future references, now the acount can be created using the following endpoint:
curl http://faucet-kylin.blockzone.net/create/111111111ooo