I tried to meet your needs. I have kept the main entrance. Behind the main entrance I placed the vestibule. Now is covered entrance from the sidewalk. The door opposite of the staircase are preserved but not used as the main door. Living room light from the main windows and there is preserved the higher height of the ceiling. It is airier. In the corner there is a small area with a kitchen and a storage island. Day part area is separated by a glass wall from the relax area (bathroom, bedroom, office). Bedroom is located at the end of the flat and we can talk about creating a window in the wall if it would be possible. The walls are white and the furniture is natural wood. The floor is wooden as required. All fixtures and fittings are oriented to the wall for better connections and plumbing. I hope that you are satisfied with the design.