Vincent D S - $1,200/month

I'm moving to D.C. to start grad school in international affairs. I am looking for a part time job, so I will likely be busy but home a bit during the day and nights when I do not have classes. I am generally pretty clean and like to keep things in order, but I am not overly obsessive about things. No marijuana, but other than that, no particularities.
I am looking for a room in an apartment or potential roommates who are also looking for apartments. I am easy-going and like to hang out in my current apartment with my roommates, so I would like to be sociable with roommates but don't necessarily need to be best friends. I am looking to move in July or early August depending on lease availability. I would like to find something near a metro stop so that I can easily commute around D.C.