At this stage in your life, I would suggest getting as much experience as possible within the fashion world!
Reach out to fashion houses and retailers to see if they offer any internships or shadowing programs so you can get an idea of what it means to be a fashion marketing manager. Most entry-level positions would prefer a university degree (in marketing or something similiar, i.e. English or Business) but I know many marketeers who worked straight from college and started their careers as interns.
Is it hard? With any career path, you have to work hard to be successful. But most importantly, show passion and keep learning.
Best of luck,
I would personally say you should first start learning abt latest fashion and people taste towards dressing in that particular place, so u can plan your future better. its better do some fashion designing course which would give idea and how to go about
Links for colleges which I would suggest
It's smart of you to be thinking about how many jobs there are in what you want to do. Fashion is not big in every city, but you can move after graduating college. To get a sense of what is out there in this particular job, search the job title at indeed ,com and simplyhired. com Indeed is an aggregator site and you can get a good idea of the employment market for fashion marketing. Two good entry level jobs are 1. Assistant Buyer and 2. Assistant or Junior Merchandiser.
You can also download resumes for free from indeed.com to view the career development of professionals in Fasion and in Marketing.