create a separate window to control stuff in VR

I’m working on a project that has the person in VR in a room and another person on the computer is controlling the creation of the environment around them. I super rusty on unreal and can use some help. I want to start by having the person in VR standing in an empty space and the person on the computer to put in the size of the room and the walls will be created around them. been searching for days and can’t find any info about stuff like this. I will be extending the player on the computer to do other things like place objects and change textures. If I can get the base functionality working I’m sure I can figure out the rest.

any tutorials or articles threads or even projects with similar functionality will help.