People will want to see pics of all the walls from different angles, straight on shots and not fisheye like the one you posted. You can edit your post to add more pictures or just add them in a comment below mine.

As mentioned by Olychick, we need more info. If you can draw a floor plan showing all dimensions (doors, windows, lenght of your wardrobe that cannot be moved, etc. it would help to figure out what can be done.

Too many unanswered questions in this pic. Why not move the wardrobe? It is nailed down? Can it be broken up a bit? Does it cover forced air vents, I see an electric heater and a fan waiting to be used. Why the office chair? I see a table. Does this space double as office? There's a window...need to see it and what's covering it. Why white with the other darker color fabrics in the room? What is on the wall where the pic is being taken from? We need dimensions and pics of all the walls.... The first think I would do is get that art work over the bed in line with your headboard. That off to the left thing cannot stay as is.