From one teen writer to another, all I have to say is to keep trying. No matter what others say, if writing is your hobby, keep trying. I can recommend you work details out of past experiences. Things such as the main character's feelings and yours should be closely alike because it makes them more detailed. It's hard to make a story if the character's feelings aren't elaborated on. Also, try to make the main character the same gender as you yourself. It's hard for a guy to play a girls character and vice-versa because most of them don't have the same feelings as the other. Also, do you draw?