How does a complete newbie get started?

This has probably been asked before, but there are thousands of questions here and I did not see a search questions capability. I’m a complete newbie. I got into this from the book, Design Games For Architecture. The book starts its use of Unity by saying that when Unity is first launched it will come up with an initial game: Bootcamp. I’m using 4.5.1f. This no longer happens. In this version my initial down load does not appear to contain any assets. I went to the web site and tried to get started with the first tutorial: Stealth. The second tutorial video (Game Setup …) says that the Stealth project files can be downloaded from the download area of the Tutorials site. Presumable one reaches the Tutorials site by clicking the Tutorial link on this page. But I could not see a “download area” on the Tutorials page. I’ve tried a couple of other things but could not find how to carry out the instruction on this tutorial video.

Visit the Learn section of the website.