Playing High School Basketball?

I want to play basketball in the future (as in high school) but I've never really been that great in actual games but when I practice I know I have the skills, I'm a great three point shooter once when I was just shooting around I made ten straight three's (no lie) and once I was one round away from making it to the finals of my league's three point shooting contest, I'm also very fast and am constantly causing turnovers on the defensive end, so I know I have the skills but how do I get good in an actual game and if so do I have potential in basketball??