How to load scenes in VR with SteamVR?

I have tried to use SteamVR load scene script but doesnt work at all, just shows the skybox or background color but doesnt show any loading bar, i set the textures for everything but doesnt show anything. After a second with the skybox or background color shows the compositor with the default texture of the mountains and also usually doesnt load the scene successfully, so this script is a total disaster. I tried to just loadsceneasync from unity but doesnt work, goes to compositor and doesnt let me show Unity UI. Anyone knows how to solve this?? I have seen videos en youtube about this but none solves anything