Yes, you can. Save your cents, it's an expensive choice for if you're promoting fashion, you'll have to look the business yourself, and to be wearing the latest outfit certainly costs! You can train to be a fashion designer, which is what you may have had in mind, but there are other fashion careers.
For instance, fashion illustrator, if Art is one of your strengths, or a textile designer, similarly. Most who set out on this job area will end up in fashion merchandising, and this can range from the most exclusive fashion houses to the two bit downtown clothing store. The sales person is the most likely to stay a shorter time in their work.