Hi,
I would advise to place the table and monitors at the opposite side of the room, there in my opinion you can get a more concentrated sound on the output, which will be less scattered around the room, especially since you already have the materials to treat the acoustics of the room and bass...
I would advise to contact the experts on the Internet, they can offer you options + some companies do 3d visualization of the room and most often it's free.
I have had experience building a corner vocal booth and chose gypsum board as the main material. I found it easy to use and not too expensive. The gypsum board is not the only suitable material, though. Plywood or MDF are quite suitable materials.