Start by measuring your available space and aim for a desk about 100 to 120...

https://emilyscoolnews.urbanvellum.com/posts/lighting-ideas-that-don-t-take-floor-space-for-a-gaming-setup

Start by measuring your available space and aim for a desk about 100 to 120 centimetres wide to fit your gear comfortably. Use a monitor arm to free up desk surface and improve screen positioning