My room needs to be reorganized

There's so much unnecessary items and junk lying around in here and I need to get rid of it all. Some of the amounts of paper and cardboard mounted on my walls need to be taken down and redecorated. I feel like they keep taking me back to my 13 year old self, they prevent me from becoming the maturing girl I hope to be. Soon I'll be 17 and my bedroom needs to look like it actually belongs to me. I have a giant Pooh bear calendar and a poster of him and his friends framed and hung above my bed. There are letters and words trapping the room in amateur font and my mirror is partly covered with stuffed keyrings and images of what I used to know as good looking boys from 2 years ago. There are 3Dimensional paper stars strongly held across my wardrobe paling and my bed is occupied by a mass of teddy bears..those I think I'll keep. I have the urge to paint my walls a different colour and use the back wall as an inspiration painting backdrop. I don't know, I'm just beginning to feel uncomfortable in my own surroundings and I think this is where the changing should start.