Does everybody help me see this door model how to pursue? Room area, study area, does sitting room a

This is among door model, not be to connect fully door model. Room space layout is not very orderly, size did not indicate entirely. It is developing zone neglect likely, or do it of purpose.

Of this kind of high level equally shared general bigger, 20-25% left and right sides. Use area ratio actually two stair room wants one ladder small 8-12%