Many of those who have practiced for a long time know that black magic, while being a label used mostly by those who don't understand what they are talking about, is a label that is used for a lot of things in magic. What exactly were you thinking of learning? It might be easier for people to help if you give more information.
Understanding what you are doing is a wonderful thing. Like was stated above, you will more than likely want to know the Basics as we call them as they are considered a corner stone of many practices and some people use them through out their entire lives.
If you have a certain tradition in mind to start out with, research that as many traditions can vary in practice and what they start out with.
Good luck in your studies