I'll start off with saying; I'm a total noob. But from what I've read, it takes practice and determination to learn how to lucid dream. Some people have a lucid dream every night. But even those people have things called a "dry spell." It's when a lucid dreamer doesn't have/isn't capable of having a lucid dream for a variable amount of time. If this question is also because you haven't had a lucid dream, keep trying. I haven't had my first either. Good luck!