You're doing so good at this, just be patient and stick with what works for you. There's a lot of great advice out there and it looks like you are proactively taking advantage of the exercise opportunities in your dorm (love that you dance in your room :)). I understand about the gym it can be overwhelming--just go at your own pace and you've done so well! Take a minute to congratulate yourself. This is a marathon, not a sprint. Posting here will help keep you motivated.
Looking forward to continuing good news from you. Here's to a healthy 2011.