Well, you will be able to make great gains in the weight room rather quickly since you are a beginner. However, it's not muscle mass you should be worrying about. The amount of mass you have has no effect on your playing performance. Instead you should focus on building strength and power using a variety of training methods. Keep asking questions and searching around and you will find samples of training programs that will accomplish these goals. Even better, if you have someone knowledgeable at your school like a coach or PE teacher, ask them some questions!