here's a schematic i put together in photoshop of what i have currently built (in black)

i need to know how to treat the room based on its dimensions.
the back wall has the door much too close to the doorframe, so obviously i cannot put a basstrap there ... so in RED i have illustrated where i think i should put the basstraps, but this is now getting to the point where i really have no idea.
im good at the physical construction side of things, but the correct measurements and things like that.. i'm not too familiar with.
this is a room in a room structure i've built and so far the drywall is all up and am preparing it for painting.
please give me some constructive criticism.. tell me what i've done wrong, and if/how to fix it.
if there's any information missing from the above diagram, please let me know and i will ammend it.
regards