Worried over summer drawing classes!?

[Akira]

I'm a photographer really, but I got the chance to apply to a summer college program at Brown. I was hoping to become more well rounded in my creative field so I decided on a drawing class for the human figure as my summer class. And though the description says its designed for those who have no drawing ability whatsoever I am still a bit nervous on how I'll measure up to others. I was accepted and I recieved the letter a while ago. I want to work on my drawing skills a little more before I arrive to the courses so I don't feel like a completely loser. Any suggestions on how to do that?
The classes start June 11th.