There are so many products, and my business has 1 installed (DevTest Workstation) that running through the tutorial for such is worthless without many other products installed.
Is there an installation of DevTest Server in your organization? In order for DevTest Workstation to work, there must be an installation of DevTest Server that it can use.
Not sure what version you are on but refer to this link in our documentation for the Tutorials for 9.5.1:
CA Application Test Tutorials - DevTest Solutions - 9.5 - CA Technologies Documentation
Mobile Testing Tutorials - DevTest Solutions - 9.5 - CA Technologies Documentation
CA Service Virtualization Tutorials - DevTest Solutions - 9.5 - CA Technologies Documentation
CA Continuous Application Insight Tutorial - DevTest Solutions - 9.5 - CA Technologies Documentation