1. Sectioning â€” haven't tried that tool yet. I don't know if views with perspective would do (room1, room2, etc).
2. Luminance â€” The best way is to assign a luminance to an object. Use "Load to render luminance only"; this way only the luminance renders, not the object it's assigned to. Place a copy in each room. I placed some in a copy of your drawing.
They don't have the greatest selection of bricks for metric use, so I made some changes. I think that greenhouse is on the wrong workplane.
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Windows 10 Pro (1903), 64-bit