In order to go far in the fashion industry, get a degree in Business Administration with a concentration in marketing and merchandising. A business degree will get you further in the fashion industry than journalism. If you want to pursue journalism, take some elective courses in it, don't make it a major area of study. It is also advisable to also take some core courses in the area of fashion.
In order to gain experience if you have no relatable fashion experience, do an internship at a department store or a fashion design house. If you are photogenic, you can also be a model. Modelling is a way to get a foot in the world of fashion. It is also a way to gain creditibility in the fashion industry.