Go online to websites, such as Learn Shorthand, and take an online course. If you just need to learn shorthand and don't require a degree or certificate, this is a fast, simple option.
Sign up for a shorthand course at your local community college or secretarial school. There are usually no prerequisites for a simple shorthand class, so you don't need to enroll as a degree-seeking student in order to take the class.
Hire a tutor to teach you shorthand. If you don't have the time or money to enroll in a course, either online or on campus, call local legal offices and find out if someone there wants to take the time to teach you. You can also place an ad in the paper or on a local website to find someone, perhaps a retiree, who could help you. This would give you one-on-one time to learn the craft.
Buy or borrow a book and teach yourself. Your library may have a book with tapes or CDs you can borrow or you can order through a catalog or website. This may be the most difficult way to learn shorthand, especially if you have no experience in the terminology, but it is the cheapest way and you can work at your own pace.