Karajorma is absolutely correct. I had my first experience with Lightwave on the Video Toaster, followed by the PC version, and hated them both (the VT version for being bizarre and the PC version being broken). Part of that had something to do, I think, with being used to working in AutoCAD. In fact, this is what turned me off to 3d apps until Truespace came along (I also tried 3dsMax somewhere in there and was like, "hey, lightwave... with windows widgets... *garbage*").
Petrarch, hit flay.com and lwg3d.com for tutorials etc. If your version is warez (which it sounds like it is) you will likely be banned on lwg3d for mentioning it, though.