Need help with Compositing with Composure

I’ve previously made a material that allows for the green screen to be removed so that the actor is seen and the map is seen as the background.

I’m wanting to try compositing with composure but the training for it is pretty lacking as it only shows how to put in a skysphere and do camera follow.

I’m wanting to use this in a VR experience so its not going to be cinematic.

Any links or help would be greatly appreciated.