I had no style when I was 17! I look at teenagers now and say, 'I wish I'd looked like them when I was that age. ' I had no style whatsoever, but style also wasn't as prominent as it is today. I was just very laid back, usually wearing jeans and tank tops and flip flops.
You only get one shot in your life and you might as well push yourself and try things. There's so many interesting aspects of making a movie; the costume department, the set design, the casting itself, the locations. It's a great, great thing to be involved in if you have the headspace for it, and I do. Try anything once.