I'm really scared of this?

Yes, other girls will be in the shower with you when you are naked. Yes, other girls will be changing in the same room as you when you are naked. Yes, there is a chance of girls taking pictures of you naked with their cell phones and sending them around school. Yes, other girl will be looking at you to see if you are bigger or smaller than them. Yes, at times you will bush up against another girl that is as naked as you are. Do you feel better now? And YES they CAN force you to shower, due to teaching you HYGIENE. Bring Flip Flops because you don't want to step on the gross floors.