Next you have the acoustic unfriendly windows on the left, maybe some curtains?
These rec’s are for any speakers you own. Finally I would get the audyssey upgrade through the microsoft store (read the review I posted) and the calibrated mic needed through amazon. Run the calibration after you get the speakers at the dolby recommended angles and maybe some drapes or curtains. Look at the room reponse I got in my profile, flat, using this same process/ I addressed my window problem a little differently, but curtains will at least help.