I agree with Plato, if you can change the dimensions of your room easily, then do that first. Get that right and then you may not need as many bass traps etc.
If you have total freedom for placement of the right and left speakers, that will help you a lot as well.
My room is 13W x 8H x 21.5 L
If you have total freedom for placement of the right and left speakers, that will help you a lot as well.
My room is 13W x 8H x 21.5 L