I need help writing some scripts for an interactive VR app in Unity

General information for the business: We produce 3D walkthroughs and animations Description of requirements/functionality: We have a VR app (in Unity) of an interior of a building that we want to build some functionality/interactivity into. We want to be able to switch between day and night scenes (hovering over an icon), bring up floor plans when in a certain room. There may be more to come but this is the start of a project that we would like to work with you on. Extra notes: