D1 is absolute right. Jump sooner and aim for the front of the rim. I achieved my first dunk the same way. Except that I was over 6 feet when I first achieved my first dunk( I am 6'3" now). I was over 200lbs though. I would've probably been dunking at 5'10". You've a god given gift to be able to ...
This is absolutely breath taking. David keep up the good work. I hope that someone discovers you in Motown.