I think he means the whole site, First off you need a server or a reseller account with a control panel looks like you have cpanel, Now in cpanel do you have WHM? That web host manager. Also a template I see that you have whmcs billing system.
You should probably do some research on what you are getting yourself into before you order a plan... If you don't even know how to get started how do you plan on supporting any clients you may obtain?