If you want to be a master of AutoCAD, so i have a link of free Video Tutorials. http://cadpax.blogspot.com/ this site contains lots of free materials that will help you on every step. If you have still more difficuties then ask me for further assistance. http://cadpax.blogspot.com/ try this one!
I've been using AutoCAD for 12 years now, but still I'll check your link, see if there's anything helpful even to me, lol. Thank you so much for sharing!