My DIY desk from a closet. IKEA shelves, desk, and boxes. Walmart filing cabinets.
You could make this headboard/canopy easily with some gauzy IKEA curtains.
You could easily do the over the bed shelving using an IKEA shelf. They have little lights like those, too! A great way to create a headboard without really having to have an actual, super high headboard.
DIY fabric headboard Good idea for guest room