Critique needed, please, something feels off

[colormusic]

Hi guys!
here's a picture I've made recently, but something still feels off. I believe that composition here is not the best one, but what do you think?

[readock]

looks already pretty good
I love the cup and the reflection on the table
one thing you can definitely improve on is drawing folds more accurate - the jacket looks a bit stiff (but that is not my strength either)
another thing is that the curtains should be a bit transparent I think...
I did a quick paintover where I also adjusted the color of the shadows a bit