Knowing what those at the top of your chosen industry have accomplished in order to reach their positions will be one of the most helpful things you can do for your career. Getting these correct qualifications for yourself should be your first priority as far as achieving your goals.
Go online and look at resumes that are posted. Check out the bios of top CEOs. Read articles on the business and as many books as you can find on the industry in which you are interested. Because few people will follow the same path to the top, make a list of entry level, mid level, and upper level positions that different people in the business have acquired. You may find that it is easier to make your way into a related industry and then transfer over to your career of choice. By looking at what those who have come before have done, you can shape your path accordingly.
Education is the logical first step when training for a career. Online classes and night school have made it possible to train for a new career while maintaining your day job. In the event that you need a higher degree that you can't get through the Internet, there are a variety of grants and loans available to fund your education. If you are confident that the career you are training for is really what you want and that this career will give you the funds to repay the steep fees for a higher degree, this may be the best choice. Networking in grad school may do more for your career than the classes you take. On the other hand, "hands on" experience is a great teacher as well. Look for assistantships, internships, and volunteer work in the industry of your choice. You may find that another career is more to your liking. The process of acquiring the correct qualifications for a given career may show you a totally different career that you didn't even know existed.