After finishing setup, the Mixed Reality Portal app should launch an immersive experience in your HMD called Learn Mixed Reality. This immersive experience will teach you how to use Windows Mixed Reality. Gaze at the gem in the loading screen to get started. You should hear Cortana’s voice in your headset giving you instructions on what to do next.
Learn Mixed Reality is an app. The app can be launched from the Start menu in your mixed reality home at any time. Using your motion controllers or keyboard:
To learn more about how to get around in mixed reality with motion controllers, review motion controllers in Mixed Reality
Learn the voice commands you can use in the Windows Mixed Reality home
Just press the Play icon at the bottom of the Mixed Reality Portal app.