Aw, come on - help us help you! What is a square - the room, or the couch? A pic of the couch, and any other furniture, would be helpful - plus a diagram showing the dimensions of the room. Does the desk stay, and if so, does it need to stay in the same space? Are the dining table/chairs the ones that will be staying in the room?

Nice space! If you could provide more details such as the style or color you prefer, the color and size of the sofa and whether you will be replacing the furniture... That would be wonderful and I believe there will be more specific advice for you from this warm forum.

Here are some bits and pieces of advice, hope it can help a liittle:

I noticed those curtain rods and if you have a need of filtering lights and protecting privacy, I would recommend blackout curtains. They can also add such a fresh touch to the space.

For the sofa, I would suggest placing it in the corner, rugs and some other simple decors could make a lovely coner!

Will the dining table and office desk be replaced? Here is some inspo if you need.