To have a preppy room, you must first make a big organization and not leave the room messy. In decoration, it is possible to create an elegant room just by changing the bedding, pictures, desk, and other simpler objects such as curtains, vases, shelves, mirrors, and so on.
If your budget is bigger, you can put colorful and patterned wallpapers, change the bed, chandeliers, rugs, and others. It is important to always have a shade of pink in some parts of the room, the amount of pink and the shade depends on personal taste.
For those who like jewelry, it is important to have a space to store them, the same goes for cosmetics, brushes, combs, and other accessories.