Hi!
I like the multiple shadows
Maybe you should try adding volumetric lighting, and dust, it works on the CPU and creates a poetic atmosphere. Good air for this was done by Zalevskiy.
There is an interesting example of work by user yonosoy
viewtopic.php?f=3&t=12049&start=150#p142494
viewtopic.php?f=3&t=12049&start=165#p142869
You can also make it a little livelier by adding an unreadable interesting magazine casually laid on the table. Or a cup of coffee with a cake. Or you can use the cat sleeping on the couch. Cat fur can be obtained in 15 minutes in any available render in a separate layer, for further blending in Photoshop.
Well, you can put a tall plant in a tub, for example a monstera or something from the Strelitzia family. With simple thin material, you get the luxurious light transmission effect through the leaves.
And I would recommend using the gobo texture of the tree to enrich your shadows. This brings a very dramatic effect.
If your artistic vision gravitates to the second option - make a rain outside the window, with luxurious wet and slightly fogged glasses, and aperture diffraction on street lamps.