Our local comm college has one of the top rated AutoCAD instructors in the country... His training seminars have scored 1st and 4th at the annual AutoCAD conference in Vegas each year... He's semi-retired now and I'm afraid he's going to stop teaching soon... He has been doing AutoCAD since 86 and has worked for Autodesk...
Here's a link to his youtube page if you need some extra background and instructions:
If you get a student email address from your school, you can download free copies of the autodesk software on your computer to practice at home for school. You are not supposed to use it for business, but it's ok to do for school and practice... Just go to the Autodesk site and enter your student email to get the link to download...