This isn't Guides specific but I thought you might find it useful. This is great training for customers, partners and developers learning about mixed reality.
Introduction to mixed reality - Learn | Microsoft Docs
From the page:
Build a foundation in the core concepts, terminology, and design processes unique to the mixed-reality development space.
- Define mixed reality and differentiate between virtual reality and augmented reality
- Describe the core ideas behind holograms
- Start designing and developing 3D applications
- Understand what mixed reality offers in real-world apps
- Use the power of the cloud for mixed reality