How to make an itty bitty room and bathroom i need to make it awsome?

My room has a queen bed bookshelf side table tv and table 4 walls and a floor and I only have like very little room to walk the walls are tan brick plastic blinds and tan floors blah we can't paint :( ccause we rent and me and my sis share a room. she 16 and im 13 anyway how can I make it teen. like and girls just no pink and make it look bigger. also my bathroom is the same colors and you can sit on the toilet touch the wall and shower and sink at the same time and can touch both walls in the shower anyway to make that better thanks