It's always a good idea to actually build and run your project as early as possible in your VR development projects. A good first time to try is once things are set up. Then, you can continue to iterate the develop, build, run, and test cycle frequently throughout development. I'll remind you of this as we develop our projects.
So far, you have set the target platform for your build, for example, as standalone Windows or Android. You've installed the XR packages and SDK required for your device. Finally, you've set up an XR camera rig in the scene using the XR Interaction Toolkit. Before you can build, you may also need to configure additional player settings.
Configuring the player settings
There are a wide variety of Player Settings you may need to configure, depending on your target platform.These control the runtime player that is deployed on the target platform and runs your Unity project. These...