How to?

Hi all,

I´m new to the this community and this line of work, although I have archviz and architecture background and some very basic knowledge on Unreal.

However, I´m working on VR project and already have an idea for it. I have attached a small storyboard.
Basically the idea is to have the player to walk in a beautiful landscape. The player walks on a premade geometry, that appears only where the player walks. When the player looks forward, the geometry gets assembled, and when the player looks backwards the geometry gets disintegrated.

Since I´m new, it´s hard to get an idea what the workflow would be. Would you recommend some tutorials, or a starting point?