how can i make my room more mature?

My room is Turquoise blue and Light blue. ALL of my furniture is white, dresser, mirror, bench, and little book shelf. My room has barbie house that i BADLY want to get out of my room i have a lot of dolls. On my bed theirs quite a few stuff animals. None of my furniture is modern I have a lot of kiddie posters and my paintings are up there just little canvas of a owl and dog and hills nothing much! My doll house is in my closest no door no curtain! it has A LOT of toys in there and i feel i am to old to do toys! My bench is a bookshelf too and all it has is kiddie books! and I LOVE to draw and i want a desk but i don’t have one! Oh and i also have 2 shelves that hang above my dresser and 2 shelves/ coat rack above my bed and the other by my bench! HELP!

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