Big Marty - social to improve your game? You have to be absolutely kidding right?
baller kid - start by getting to a ring, a lot. Shoot, shoot and shoot some more. Practice mid range first then step out to 3. Practice finishing with your left hand. Practice some dribbling drills and improve your ball handling. And shoot free throws between every drill.
Second, hit the weights. This is the perfect age for you to get stronger and bigger. Focus on leg weights and your core strength. A personal trainer can help with that.
In my opinion you should stick it out with your club for a while. It is fairly uncommon (except in circumstances where a kid has a big rep or a big game) for a player to get consistent minutes at div 1 senior level in their first few years as a senior. Try play div 2, but if you are at a talented, good club just training with the best at your club will improve your game a hell of a lot. Whenever scrimmage occurs, always put your hand up to guard the best player in your position. You might get burnt a bit, but you will find it will improve your defensive game a sh*t load.
If you're not training with the seniors yet most clubs have an open door policy at the end of each ABL season. Go and train with your clubs' senior side then and look to get a spot on the squad, even if you're not making the ABL bench - you should get to play reserves.
Changing clubs isn't always a good solution. I think sticking it out and being patient, committing yourself to improving in the meantime by sheer hard work, and if it hasn't happened after 2-3 years of seniors at one club then look to move. Remember if you change clubs you will only have to prove yourself that much more.