Planning a gaming setup in limited space starts with choosing a desk around 100...

https://hotel-wiki.win/index.php/Best_Way_to_Fit_Keyboard,_Mouse,_and_Monitor_on_a_Small_Desk

Planning a gaming setup in limited space starts with choosing a desk around 100 to 120 centimetres wide to fit your gear without feeling cramped. Use a monitor arm to free up surface area and keep your screen at eye level