To begin installing Joomla 3 via the SiteGround Wizard, first you need to access your User Area. After you signup for our Joomla hosting package you will receive all the necessary information you need to login.
When you login to your User Area for the first time, you will see a popup asking you whether you want to Start a new website on your account. Select that option and click on the Joomla button.
A new section would appear where you should enter the login information for your new Joomla 3 application. When you are ready - click on the confirm button.
Next, pick which enhancements you wish to add (if you want to add any) and click on the Complete setup button.
That's it! You can now go to the front page of your site and check out the newly installed Joomla application.