Registering a domain name is very easy.
First you will have to make sure that the domain you want is available - using something called a WHOIS lookup at sites like who.is or our website www.rojekohost.com, Whois Source you can make sure the domain you want is available for registration.
Afterwards, you simply need to visit a registration site such as www.rojekohost.com to purchase your domain name. you can buy domain name with hosting package.