It is very simple to set it up. Watch this video to help you get started.
Affiliates- this is a great money maker for your blog, you can choose Affiliate products to review on your fashion blog. I would choose items that you have used before so you can give a true post on how you liked the product. You can even make a Youtube video of it to get more views and a link for them to purchase the product. Make sure not to try to sell the items this will turn people off. Reviews are the best way to go.
Ad Space- For this to happen you would have to pull in lots of traffic. If your website is pulling over 1k and up on a monthly bases you will be able to make money with Ad space. I have worked on Fiverr and done blog mentions for business owners and also offered ad space they of course all asked for my blog stats. If your blog stats are high you can offer ad space and make great money with this alone.
Upwork- Your next income is Upwork. They have companies that need someone to blog for them and help them with their Social Media. You can do this for $10-$20 an hour. This is a great way to get clients on a regular bases. I started out doing this making $20 an hour and made a great income from this and I continue to work with clients on their blogs and Social Media accounts. This alone will bring you a full time income. Upwork.com