Ну это лично твоё сочинение, я ведь не знаю, как выглядит твоя комната.
Но так ты можешь начать:
The place where I feel the most comfortable, and show my personality, is my bedroom. This is the place where I can really be myself and do what I want; it’s the place I come home to, and wake up every day. My room makes me feel comfortable because it is my own space.