Open any web browser. And in the search box type  www.freenom.com  , a new page will appear in the browser and first of all you have to create an account of  freenom which is very simple and easy. After creating an account click on Register a new domain. You can choose your own domain name and check the availability. If the custom domain name is available for you then you can register the domain name. and within a minute your domain will be registered and you have to buy hosting package.