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

https://www.web-bookmarks.win/start-your-gaming-setup-with-a-desk-around-100-to-120-centimetres-wide-to-fit

Planning a gaming setup in limited space starts with picking a desk around 100 to 120 centimetres wide—big enough for your monitor and keyboard but small enough to fit tight corners