Hello.
The best place to set started is on Luke’s blog. He has a quick start guide. It talked you through a 5 day what to do when. It is located here: http://blogs.msdn.com/luke/articles/category/7732.aspx
The best part is the MSDN Demo labs. You do not have to have Biztalk installed at all to run the labs since you user a virtual pc through the web.
Best of luck.
Stephen W. Thomas