Planning a gaming setup in limited space starts with a desk about 100 to 120...
https://mike-wiki.win/index.php/How_to_Hide_Gaming_Gear_When_Guests_Come_Over:_A_Practical_Guide_to_a_Setup_That_Disappears
Planning a gaming setup in limited space starts with a desk about 100 to 120 centimetres wide to fit your monitor and accessories comfortably. Use a monitor arm to free up surface area and create more room for your keyboard and mouse