Music is a large and diverse profession, with a wide variety of disciplines and ways of conducting business. Music differs from other professions in its points of entry. For many performing musicians, a formal audition is the only way to be hired. The business side of music can sometimes be approached through informal apprenticeships or a period of unpaid service that leads to employment. Regardless of one’s specific career interests, there is no substitute for deep and detailed knowledge of that specialty.
Read books about the music business. Go on the Internet and visit music business websites such as the Berklee College of Music career page. No book can unlock all of the secrets of finding a career in music, but the better publications do give an idea of the standards of professional qualifications and behavior in the field. Magazines exist to cover virtually every area of music and are especially useful in keeping up with month-to-month developments and innovations.