I'm a high school student and I'm interested in getting Autodesk CAD and sort of playing around with it and teaching myself how to use it. I used it during a quarter long class in 8th grade, which was three years ago, and really enjoyed it. I'm also looking into engineering as a career. I know that educators and students can download CAD for free. If I'm using it on my personal computer and in my free time, does that count as using it as a student and allow me to download it for free, or do I need to pay for it in that case?