The following power point contains some reference slides to start up with DSE/ThingWorx integration.
Start with understanding DSE architecture and specifically, the differences compared to regular Relational Databases.
Free online courses offered by DataStaxAcademy:
The following section will guide you through some of the specifics:
The links are actually valid, there are some issues with the redirecting on this platform though. Until it's fixed, you may either copy the link by hand or click on it and then remove the "community.ptc.com" from the URL.