What I see here is an opportunity to really reassess your things, instead of just accepting the amount and specific things you own and finding a different way of rearranging them. Since you’re tight on space, purge any extra stuff that might just be lingering. I know many people are big fans of the KonMari method!
If you’ve already gone through this step and or cannot find anything you need to get rid of, focus on clearing the space and making it as zen as possible. Think vertically with storage, installing shelves on the walls and keeping the floorspace and desk space as free and clear as possible. The best way to make your room look bigger is to not overwhelm it!