I have to admit that i loove this it's so good and i dont know its just astonishing of course if you enter the beginner category you could win because really looks like one of or th best art pieces but i know what youre saying that you are fifteen and have had experience but to be honest i think to keep everyting fair and so that you could also learn from artists whom may be batter than you , i think you should probaby enter the open category and you may not win a prize but youll still have that amazing piece. But that's just my opinion.