Planning a gaming setup in limited space starts with a desk around 100 to 120...

https://garrettsinsightfulchat.wordcanopy.com/posts/setup-checklist-for-a-small-gaming-desk-what-to-prioritize-first

Planning a gaming setup in limited space starts with a desk around 100 to 120 centimetres wide to fit your monitor and keyboard comfortably. Use a monitor arm to free up surface area and keep cables neat