Planning a gaming setup in a small space starts with choosing a desk about 100...

https://ace-wiki.win/index.php/What_Should_Be_Within_Reach_in_a_Basic_PC_Gaming_Setup%3F

Planning a gaming setup in a small space starts with choosing a desk about 100 to 120 centimetres wide to fit your gear comfortably. Use a monitor arm to free up surface area and improve viewing angles