Learning how to draw is a step by step process. You can accurately say it's more of a journey. However what you need to realize is a journey has a starting point, a beginning, and everyone has to start from the beginning. An image can be drawn with colors as well as without colors. If you are a beginner then it is always better to start with black and white drawing. If you are capable of mastering the art of black and white drawing then you can surely begin color drawing.