Going upstairs... feedback appreciated

Hi,

So, in my quest to learn Blender (started 4 months ago or something…) I tried to replicate a photo I took.

This is the result:


Original photo:


The modeling is not yet finished but I would love to get some advices on how to improve this. My biggest issues at the moment are the materials/textures, the values for bumpiness for example and the lighting.

The project files and the original photo are available in my dropbox here.

Thanks!

change bumb strength to 0.2 or 0.15
change glossy roughness to 0.3
change mix factor to 0.5
and use RGB curves in side walls

Change bumb Strenth value to 0.2
Change Mix Factor to 0.5
Change glossy roughness to 0.3
use RGB curves in Diffuse for side walls

Thanks vigneshwaran!