Remodeling

In my parent's house, we have two rooms downstairs, and three upstairs. I used to stay in one of the downstairs rooms, but due to the weather issue, I moved upstairs last year, and I took some time decorating my room  and repainted one of the walls with cool wall stickers.
But we have a new guest that is going to live with us! So my parents asked me to move back downstairs, which has been a storage for about a year now....And I have decided to remodel/decorate this messy room! Here are some pins that I have posted on my pinterest board for some inspirations!
Do you have any suggestions?