EPHEMERA0023
You can wear absolutely anything you want, and you can dance, or not, exactly how you want to. In my experience, festivals are some of the least judgey public events. My best advice on navigating is when you aren't sure where you want to go, close your eyes and listen in 360 degrees, then go in the direction that sounds the most interesting. Festivals are the rare opportunity to do exactly what makes you happy. If you can breathe through any rising waves of anxiety (in through your nose, out slowly through your mouth) I'm sure you can find a good time.