Young_baller,
As others have suggested, master the two pitches you currently throw. Try to learn to throw them from the same release point, and learn to control them. In addition, work on increasing your velocity and how to best take care of your arm. My oldest son did not learn to throw a curve ball until he was 16 (done growing at that point) under the advisement of his pitching coach. It turned out to be golden advice for him.
When and if you learn to throw a third pitch (breaking pitch) make certain that you are throwing it correctly. In addition there is a pitching forum on the site. Feel free to ask questions there too. Good luck.
I agree with Truman. Everybody mechanics are unique. Stick with what is comfortable and effective for you. What you can model yourself after is their approach and methods to get hitters out.