Internet domain registration applies only to the main domain not the subdomains, which are handled by the web host.
Otherwise you will need to ask someone with a web host who can share some space.
Your web host will walk you through the steps needed to install your blogging platform, which is commonly WordPress.
Downtown Host - If you are looking for an excellent web host with more features and the ability for your site to grow as your web building skills grow, you will want to take a look at Downtown Host.
Very often, the web host also offers website statistics tools that are part of your hosting package.