Either buy a student copy or download an Evaluation copy of IntelliCAD
you may consider purchasing that after you have used it a while.
It's close enough to AutoCAD that you can learn how to fly one by
using the other.
PS see my website on how to get IntelliCAD to look like AutoCAD
Polytechforum.com is a website by engineers for engineers. It is not affiliated with any of manufacturers or vendors discussed here.
All logos and trade names are the property of their respective owners.