To not be afraid. There are thousands of other freshmen just trying to figure out who they are at the exact same time. Don't be afraid to try something different, to dress however you feel and to act in a way that makes you comfortable. No one is looking at you and no one who matters cares. Even if you do make some sort of "scene," anyone who saw isn't going to remember at the end of the day, and if they do, it's because they're your best friend and you're awesome. Just do everything, because your responsibilities are as minimal as they will ever be again, you have the time, energy and naivety to do anything. So just do it.
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