fashionlives,
To be honest with you, that is really not a specific enough a question for a fashion forum. Although it can be applicable to fashion, we've already got lots and lots of threads .. . about opening boutiques, starting a fashion line, becoming a stylist, a makeup artist, a photographer, a publisher of their own e-zine or magazine, e-bay sellers, sellers of vintage clothing, jewelry designers and so on ... anyone offering any kind of service or product ... all of these people are entrepreneurs.
So if you want to learn about running your own fashion related business, I strongly suggest that you do an advanced search through Careers & Education for each of those specific topics, spend some time reading each thread and you may ask any specific questions that have not been answered in the various threads.
Hope this helps you find your way around Careers & Education.