Getting Started with Godot
Before jumping into VR, you should get yourself acquainted with the engine and how things work. Godot utilizes a node-based system, similar to Unity except everything is its own node.
Documentation (4.2 branch)
https://docs.godotengine.org/en/stable/index.html
Overview of Godot's key concepts
Your first 3D game
https://docs.godotengine.org/en/stable/getting_started/first_3d_game/index.html
Additional resources
Below is a tutorial on how to orient yourself in Godot. It's recommended for beginner's to follow this guide to get familiar with the engine.