first, I want to ask you to make sure of that your website works fine first .. what I mean by that ?
make sure your site is loading fast,use page speed test,improve your website design make it more user-friendly
then start on your SEO . write a unique and attractive content related to the fashion and adding your keyword in your content and meta tags.
try to build some backlinks on a site related to fashions (forums - blogs)
earn some social segmentation ( facebook - twitter , whatever the effective social platform for you).
optimize your images because lots of ppl don't do that.
use webmaster tools & google analytics
also, a small note don't use a keyword that has a lot of competitors and hard to ranking on then say there are no results
there keywords need half of year to ranking on.