Autocad? You should be able to learn that in a few days hardest part of autocad is knowing when to left click and when to right click lol.
I just got Mastercam 2 months ago for programming my CNC lathe 16,000$ ...Try programming a Higbee blunt start on the front of a thread sometime
Autocad has a alot of features but you won't need to learn them for whatever your doing in class because I know your not in college yet.
Look for a old copy on ebay.
I think were still using autocad 2000 the software doesnt change that much IMO...but none of its cheap