Hi Boris,
You have a pretty good composition going here. There are some things that can be improved to really make it a nice scene.
All of the materials are overbright. I think the color selections will work really nicely if they have a more realistic tone.
You have lots of good directional lighting, but none of the drama associated with focused light because the overall illumination is too even. There is almost no detailed shadowing anywhere.
Make sure all of your objects are sitting properly on shelves and things. Maybe a little more variation in types of accessories would be good.
The smoothing is odd on some of the doors, making it appear unnaturally puffy. I'm sorry, but I don't recall what your host app is.
There is noticeable segmenting on the large arch.
The UV mapping on the chair cushions could be improved. And the arrangement of the chairs could be less uniform.