ParaView is a well-known software, and there exist many resources which teach you how to use it. The official documentation for ParaView can be found here. The best way to get started is to have a look at the list of tutorials on the ParaView website.
We recommend the official ParaView tutorial as a starting point.
All the data needed for the tutorial is available inside the bwVisu-ParaView application, so you can get started
immediately. The tutorial-data can be found under /bwvisu_examples/ParaView/ParaViewTutorialData.