From a height of approx. 1.8 m, the unit must be turned upside down and, as a rule, attached to the rear wall or ceiling with an appropriate holder, or simply turned upside down and switched to "ceiling projection" in the picture settings. This is normal and is the case with all projectors.
At a distance of 3.6m, the image will have a diagonal of about 2.7m, which is very large. Of course you can use digital zoom to reduce the size of the image, but you lose quality.
Personally, I have it at 2.2m, the beamer is mounted at the same height as the upper edge of the screen and upside down, distance 3.5m and picture size 2.6m.
So much for my experience.