Confused About Modeling?

Ok so...
My name is Debbie,
I live in Kentucky with my mom,dad,and sister.
I currently do not have a camera so the picture is the only current one I have at the moment, it was taken with a webcam.
A lot of my friends,teachers,and family have tried to convince me that I should model. I have been told that I look older than I am. I am 13 years old. I have never really thought about modeling myself but I love watching Americas Next Top Model. I believe my height may be a problem though. I am 5,5.