SSRS Report Manager Site Problem

Hi all,

I have recently started learning SQL Server mainly focusing towards SSRS. I have installed properly SQL Server Express 2012 with reporting services.

But, when I try to open Reporting Services Manager Website I don't see the Report Builder link to install it. I am studying some online course and every instructor asks to install report builder from there?

I have put myself as an admin in the site settings also under the folder settings I selected everything including Report Builder.

Can someone please help what am I doing wrong? BTW, I am the only administrator in the system.

Thanks in advance.