Planning a gaming setup in a small space works best when you measure carefully....

https://www.hotel-bookmarkings.win/planning-a-gaming-setup-in-limited-space-start-with-a-desk-about-100-to-120

Planning a gaming setup in a small space works best when you measure carefully. Aim for a desk about 100 to 120 centimetres wide to fit your monitor and keyboard comfortably. Use a monitor arm to free up desk space and keep your screen at eye level