How to start and build a successful career as a DJ-from at-home mixing to making demos to playing to a live crowd Whether it's a digital or vinyl track of "Proud Mary," a DJ sets the mood, amps up the excitement, and gets a crowd of revelers rockin'. Often an outsized personality, blessed with a gorgeous voice and an encyclopedic knowledge of music, a DJ is this era's new pop star. For those interested in how to begin a career as a DJ, DJing For Dummies...