Tips on styling my outfit?

You are in a tough situation, and to be honest there isn't much you can do. But to spice up any outfit, turn to accessories, consider adding cute brooches (which aren't grandma-ish at all if you do it correctly) and try wearing statement earrings or necklaces, not at the same time of course! The thing I would focus highly on is your makeup and hair, that is what will mostly make you stand out. Have a good time :)