Good question - it's up to you. If you don't currently have your own system up and running, either use the fictitious plant (NuGreen.xml, see attached) or one of the Asset-Based PI Example Kits. I'd recommend to go with the asset-based example kits, since they can allow you to work with an environment that is more similar to what your actual environment will be. Here's a video that should help you get one of the kits installed on your sample environment.
NuGreen.xml.zip 12.7 KB
when do we use the PI Cloud Environment? I thought it is for the excerices.