Yes, and you should make sure that the anchor you're using is rated for the right weight limit. You don't want to hang something heavier than the anchor's weight limit.
focus on finding friends in the classes that you have for the full year. You’ll get to know these people better, and an opening might come up to invite people...
Use a backpack that has wider straps so that the weight is evenly distributed across your shoulders, that gives a lighter feel. Also, manage your things evenly inside your backpack...
Yes, it would leave screw marks in the ceiling that you would have to spackle and repaint. If you didn't screw into a beam, the weight of the furniture would...