I was in the same boat you where in when I was your age I had it bad but the thing that kept me going is commitment and discipline I got better in one summer I got so much better I was able to give an college player that is 6,9"
trouble you just gotta get on that court and get your mind right. Things that help me are listening to a song that really gets you in the mood for me it is Tupac My Ambitions AZ a Ridah. Looking at nba clips on the internet is good to my Mentor told me to find nba players that you like and watch them and try to become them taking all of there moves and making them into your own for me they are Len Bias Paul Pierce Dwyane Wade and Kevin Garnett