Hi,
if you're looking to quickly get going with Azure Remote Rendering, the Quickstarts and Tutorials sections of the documentation are a good start. For practical showcases, you can find both Unity-based and native c++ sample applications in the Azure Remote Rendering Github repo.
If you are intending to build an application with Unity, I strongly recommend going through the Render a model with Unity steps first, and depending on your target platform, additionally Deploy Unity sample to HoloLens or Deploy Unity sample to Desktop. These should give you an idea of the service and the fundamentals.
You can also find additional information about available sample applications, models and code in the documentation's Samples section. Finally, what also might be of interest to you are the How-to guides and Troubleshoot sections.
If you run into problems, please don't hesitate to ask again. For code-specific issues you can also open up an issue in the Azure Remote Rendering Github repo.