Paul, about your question on tutorials at Lynda.com:
I presume there are several tutorial sites for ACad, so maybe the others are as good or better.
And your question: "Am I right to assume that ACAD & ACADLT are so similar that I can use many lessons from ACAD for ACADLT?"
I am now using the tutorial "AutoCad 2011 Essential Training" at Lynda.com. I'm about 2/3 through the tutorial (it has a total of almost 7 hours of content). I'm a "newbie", and so far it seem totally appropriate to ACad LT.
They charge $25 per month for unlimited access. I made sure I could cancel at any time. They have a couple of the sessions available for free to try.