Walk around and look at the bed, walls, closet, and lighting for renovation tips.
Bedrooms reward restraint more than ambition. The biggest visible mass is the bed plus the wall behind it, and that wall is the cheapest place to add character: a single accent wall in a saturated color or a board-and-batten treatment costs less than a hundred dollars and reframes the entire room. Lighting matters more here than in any other space because you experience the room at low light far more than at full brightness; layered fixtures with dimmers - overhead, bedside, ambient - outperform a single bright ceiling light by a wide margin.
Closet upgrades fall into two tiers: drawer kits and stackable bins under one hundred dollars, or full closet systems in the thousand-dollar range. Almost everyone who installs the high tier wishes they had done it sooner. The dresser and rug should be the last items chosen; they finish the room rather than define it. Window treatments at ceiling height, not window height, make a low-ceilinged bedroom feel taller for the cost of an extra rod and longer panels.