I heard its pretty much a clone, so can I use the tutorials without running into issues?
Yes. You can. Check out this draftsight tutorial which ties with AutoCAD:
The UI in quite different between these two CAD software,there are another CAD Software called ZWCAD, is quite familiar with AutoCAD. It keeps classic icon and user interface just like AutoCAD 2006.
Got it! Thanks, ZWCAD support LISP, do NanoCAD support it?
There are other CAD with UI close to AutoCAD. I suppose DraftSight was the choice because it is free. There another free option - nanoCAD. It is like AutoCAD LT plus it has API (.NET, C++)
You can compare both the Software and based on your requirements you can choose any. I have used both and I can tell you that if you know AutoCAD then you know DraftSight . Even you can enter most of Autocad commands in DraftSight and it works! Just try to understand UI .
If you need more info then visit http://www.cadoasis.com/draftsight-tutorials/