You selected the following access level on your profile:
This indicates you purchase hosting from a web hosting provider. This provider will have configured name servers that you can use. You will need to contact your web hosting provider to determine which name servers you should use. You can then access your domain registrar to change your name servers to the ones they provide you.
You should be able to code up your site once the DNS has resolved to your correct nameservers (usually takes 24 + hrs to propagate) provided by your hosting provider or data centre.
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You can actually access cPanel at anytime by using the IP address instead of your domain name. The domain name itself should resolve across the world in that time frame, but often sooner than 24 hours.