Part selection and general questions about building AR headset

I am in the pre-prototype stage for hacking together some AR glasses. I don't need any circuit
design. I just have questions about what parts to select and how to get to the prototyping stage.

Let me know if I need to provide clarification for anything. I am open to getting on a call.

I have attached a pdf that includes my questions and design goals for the project to this posting.