Not knowing AutoCAD is no excuse in these days of connectivity. Now you can find online manuals with videos for free.
This option I show you is perhaps the best alternative course to learn AutoCAD easily. This is Luis Manuel González Nava work which version existed in a 565 pages printed book and two DVDs, and now available on AulaClic platform.
The methodology includes explanatory sections, concepts and images that complement learning with video tutorials loaded on YouTube with audio and explanations beyond what we might expect. While the interface is based on pre-AutoCAD 2009, its value is the methodology because commands are the same.
It is now completely free, provided that you see it online from AulaClic. It is advisable to watch videos one by one, without despair until understanding full dimension of what the system makes; then you can delve into written content. Next step could be to try doing the same jobs of the video, stop if necessary, and with that dynamic certainly in four well engaged days someone could teach himself the program as if it had been (or better) than if it had been a 60 hours course.
The general content division is separated into 41 sections that can be seen from the Main Index. There is also a video tutorials index with the same numbering.
This is the videos index.
After this, I show you a video example, as you can see have explanation not only of program features but also concepts and adapting to conventional artists. This is the print section, one of the most complicated issues in AutoCAD courses.
So if your intention is to learn AutoCAD for free and using videos; this may be the best way.