What is modern dance? It's the most pure and simple form of movement to music you're ever likely to experience. It can be fast, slow, high impact, gentle, loud. Modern dance steps can be a challenging choice for a classically trained ballet dancer, but no matter what your training background, learning them can be a. How to Become a Professional Modern Dancer. Suppose you are not the usual occasion, you didn't start dance when you where 3 years old.