You will not be able to receive e-mail at your domain, nor upload or access your website with your domain name until your domain registration is processed, or the DNS settings are changed by your registry (it usually takes from 24 to 72 hours).
To confirm your domain is active and DNS settings are correct, access your domain name in a web browser as you would any other website. If you see "Your Account has been created" message, your domain is pointed to our servers and is ready for use.
You also will get a temporary Domainname (dxxxxxxx.uxxxxxx.myhelpinghost.com) to access your domain before your DNS settings are changed or the domain registration is processed. (see welcome e-mail)