Use bed + notebook combo
Few suggestions: If you can set your chairs height, try it a little bit higher or lower to get more comfortable with your arms. If your arms cant lie on the desk or something your whole body will bent to the front, caussing your back to get pressured which can hurt with time. Also dont try to sit too layed back and whatever you do, don't you ever bent the fuck towards your screen with your neck, its poison for every bone in that region.