Getting started is really easy, first you have to go here to create your account. After that, you log in to the site and you click the 'Create a new Site' link. There you pick a title and a subdomain, or if you want to you can bring your own domain. You also need to pick an administrator password, this will allow you access to all the administrative functions of your website. Then when you're done you click the 'submit' button at the bottom of the page (make sure you check everything twice), wait for 5 seconds to give our server time to configure your website and you can then click then link at the bottom. If that all went well you should now have your very own drupal site. If it didn't we'd like to refer you to the 'support' section :)