XFree86 -- next step?

[Jay O'Brien]

I finally have XFree86 working, at least to the point that 
I can type "X" and get the expected grid and "X" mouse cursor.

That in itself doesn't seem very useful, but it works.

As a learning exercise, which Desktop environment should I 
install as a first effort, and how do I run it? 

I'm referring to the FreeBSD Handbook at:
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/x11-wm.html
Desktop Environments

I intend to install Mozilla as a browser, in case that makes 
any difference. 

Also, what is the mechanism that interprets the "X" command to 
run XFree86?

Jay O'Brien
Rio Linda, CA USA