To be a professional in any sport it will take a lot of time, practice, and perseverance! I would start by joining a local team with a strong coach that will teach you the fundamentals of volleyball. As you get more experience, you can then move onto a traveling team or play for your high school volleyball team.
You can be great at anything you set your mind to, just remember to never give up!
You must know that you can do anything you set your mind to do. Train hard in the weightroom and really focus on getting your form right as far as serving and bumping and timing your jump at the right time. Practice even when you don't feel like it. The best time to get better and to improve your game is in the off season so try to find a one on one trainer to help you and show you the right techniques. Good luck I know you can do it!