Hints&critics welcome, w/out postprocess.
Very nice … now, consider the lighting in both the foreground (the chair), and the right side of the room.
Also – be very careful that the lighting is plausible! What, exactly, is supposed to be the source of that (very essential) spread of light along the ceiling, next to the left wall? . . . ??
There are object lights outside the widows, HDRI and incoming/hardly noticeable/ light from the other room, mostly as Irradiance/baked/. There some SGGI addon to Eeevee-how could i improve irradiance
in such interior scene? /still in Eevee/ ?