Are you learning System Center Orchestrator 2012? If yes, you can download some example runbooks to help you practice on Orchestrator. These can be downloaded from codeplex here: http://orchestrator.codeplex.com/releases/view/86195
There are 43 total runbooks most are for each of the products in the System Center 2012 stack but there are a few for general administrative tasks.
You need to do is import them and make sure your global configurations are set specific to your environment. You must also have the System Center Integration packs installed.