In order to perform the remaining recipes, you will need to be a system administrator on the report portal. On a new installation, only the administrators of the computer upon which SSRS is running will have rights to the server. Thus, the first thing you'll want to do is add your Windows ID (or a Windows Active Directory Group you are part of) to the list of administrators.
Once you've done that, you'll then need to give yourself permissions to the Home folder. Let's see how.
To perform this recipe, you will need to be logged into the computer upon which SQL Server Reporting Services is running (remote desktop is fine), and your ID must be one of the administrators for that system.