How do you draw a face and body?

I'm going to be a junior at my highschool and my future profession is going to be CGI Artist (hopefully) but I have no idea how to draw anything. Seriously, I suck at drawing and I'm wondering if I can at least figure out how to draw a person without it looking incredibly retarded.... I would really appreciate the help.. Remember, I suck at drawing so no super fancy stuff a beginner wouldn't be able to do.