First things first - you have 2 ways to monetise.
1 - build an audience
2 - get paid to write (not necessarily on your site).

1 - How to get readers and build an audience
If you have an audience then advertisers will pay to promote to your audience.

It's important that you ensure your audience find the adverts relevant and appropriate or they will unsubscribe.

As a fashion blogger you can often get free product (clothes) from retailers in exchange for your writing about them. I recommend you then sell the clothing to raise funds. When you're a very good popular blogger you can charge money, till then, ask for product.

The easiest way to get paid is to install Google AdSense on your site and in your email newsletters. I use FeedBlitz.com as my newsletter distribution service and they also insert adverts (from a different service) into the newsletters.

2 - Get paid to write - go research the online freelance marketplaces like Upwork.com, guru.com, freelance.com and find paid writing gigs.
You can often re-purpose writing for your own site at the same time.

I often re-use Answers from Clarity.fm for my own blog.

Here's a good list of places to learn more
http://www.bloggersclub.com/ is an agency representing bloggers to brands.
http://www.hongkiat.com/blog/sites-to-get-paid-blogging/
Read anything by Neil Patel on how to grow your audience
http://neilpatel.com/2016/01/17/six-figure-consultant-4-proven-services-every-blogger-can-offer-to-make-money-online/