Creating accounts is simple when you have at least one account in EOS network. If you do not have, that can cause an issue. Why is that, well because creating account takes EOS network resources. Transactions in EOS are free, but users have to pay for account creation as it takes RAM in EOS network. Minimal space required is 8KB of RAM, that costs currently around 0.17 EOS. Price will increase over time.

Realtime EOS resource monitor can be found here https://www.eosrp.io/

There are two choices on how to do it currently:

1) Ask someone to create account for you, but accounts are not free.
2) Use ZEOS tool that proposes such service, of course there’s a small payment on top. Right now we found only one, https://www.zeos.co

It works and you can pay with ETH, BTC, LTC, BCH. Assuming it is safe as this project uses Coinbase payment module.
After account created just double check if it got right keys you provided. So you are set and no one else can access your account. You can do it via EOSPark.

Example. See microsoftcom account https://eospark.com/MainNet/account/microsoftcom and check permissions tab. You should see only your keys used to create account.

NOTE. Hurry up, you can still find great account names available and buy them out. Account names have limitation of 12 symbols. You can use 1–5 numbers and a-z characters only, don’t worry tools can verify it.

Nicehash says cant connect(after registration, auth is wrong)

Can I just buy coins and create masternode on my own?