Welcome Chris, you've come to the right place, this forum is a great resource, it has helped me tremendously over the last year and half. Here's a few links to you tube videos for cad and Sketchup:
http://www.youtube.com/watch?v=MtqJh-DUG30
http://www.youtube.com/watch?v=FsnT8KN8xIM
http://www.youtube.com/watch?v=UtE8q9RAl-M
And some useful plugins when using cad with Sketchup:
http://www.smustard.com/script/DeleteShortLines
http://www.smustard.com/script/ExtendCloseLines
Mike