To plan a gaming setup in limited space, start with a desk about 100 to 120...

https://simonsnewchat.rivetgarden.com/posts/best-setup-for-discord-and-gaming-on-one-monitor

To plan a gaming setup in limited space, start with a desk about 100 to 120 centimetres wide to fit your monitor and accessories comfortably. Use a monitor arm to free up desk space and give you flexible screen positioning