Boy have you got some big problems. If you wanted good acoustics you probably shouldn't have gotten a different place. First the open floor plan is disatrous. I have worked with that before and it makes it difficult at best to keep the sound contained or to adjust your equip. Second the height of the room makes then takes your sound in another direction. Finally those windows are killing you. First I would get pretty heavy draps for the windows. Consider something for the upper part of the open area. I don't know what to do about the ceiling other than sound reflecting acoustical apps. If you want to go that far research how to do it. I would also suggest pulling the carpet and consider put cork on the floor followed by heavy fiber pad and then put the carpet back down. You can get cork over the web from several providers at a good price. I got it in sheets and cut it.
Good luck Ken
Good luck Ken