OpenXR Documentation / Getting Started

For what I’ve read, Valve announced full support for OpenVR in their new SteamVR version, already available in beta.

https://docs.unrealengine.com/en-US/SharingAndReleasing/XRDevelopment/Openxr/openxr_prerequisites/index.html

However, even with this documentation… how do you start from scratch to get your VR “hello world” running?
The standard UE VR scene seems hardwired with SteamVR.

Do you create your HMD + controllers actor from 0?