can't draw!

OMG, i'm freaking out! I have to be back at Atelier Chardon Savard in june to show some drawings that Chardon told me to do as kind of a "homework". The only problem is: I can't draw for a dime!
I don't know what to do, I really don't earn that place in that school, I just look at all the sketches the students do in that school, and they are way too good for my level :P I'm panicking, can someone please give some talent....
I'm trying to do my autoportrait, but it just doesn't look right at all...