I'm severely disabled from a back injury and I use this(link below) over my bed, with a vesa wall mount attached in place of the horizontal bar mount that comes with it. I've also got a pair of joycons that I use as dual mice through steam so I can put my arms anywhere. You need a wall mount arm that tilts up and down though, which a lot don't. I also have a lightweight keyboard that hangs from behind the monitor by twine and some sticky wall hooks so it's virtually weightless and allows me to elevate my legs and not have to hold up the keyboard to type

https://www.amazon.com/gp/product/B0109Y3CCE/ref=ppx_yo_dt_b...