Treatment for my room

Face the glass door/window. In theory, your listening position will be 38% or 203 cm from the front wall (glass door) but you can fine tune this with listening tests and acoustic measurements.

Do the best you can but don't obsess over symmetry on the front wall as the speakers are firing away from it.

Go back and re-read all of Ethan's stickies and links. The position of the cloud, depending on it's size might not be exactly over your listening position. It should be centered on a point between the speakers and your listening position...just like your RFZ panels on the sides. If you want to make it larger, that's ok but it's primary job is to absorb reflections from the speakers off the ceiling to your listening position. In larger rooms, it would not be wrong to have two (or more) cloud panels. Panels can be built with sides that are not solid wood or metal but with holes or slots to allow the sides to also absorb. If you do this, spacing more panels about an inch or 2 can increase their effectiveness somewhat. BTW, I think 4" thick panels spaced 4" away from the walls or ceiling is a practical, effective design, you can go thicker but 2" is the minimum I would go.