Okay, these models are like six feet tall and wearing heels, but we can still try. First, don't slouch! Wear well-fitting dark skinny jeans and add a pair of boots you can actually walk in, and practice. You'll get there.
I just found Shezgood.com, a ridiculously expensive site full of beautiful Made in Korea clothes. I'd need to win the lottery to get some pieces here, for now, I'll just have to settle for window shopping.