Hi
I am very happy to have participated in this design. In my experience, it is better to use white color to make the space bigger and brighter. Also, due to the limitation of distortion, it is better that the partition wall has the least damage, and only space is enough for light to pass through. It can also use retaining columns in this space.
Also, with minor changes in the plan of the rooms, the corridor space was removed and I added it to the useful area of ​​the house. Inside one of the rooms, I put a wall cupboard and in the living room, I put the TV in a cupboard, the door of which can also be sliding.
I am also available if needed.
Good luck.