1) The second tutorial works (opens up) while the first one doesn't (which makes the first tutorial obsolete).
2) Certain commands such as \boxed or text are missing from the list.
While the tutorial doesn't seem to work well, you might try this one:
This is where I got my basics in LaTeX.
I think that some functions used on this site is different in some places, but the variations are not that big, as I'm able to use most of the LaTeX I already know .
I had this link posted in your other thread, but just in case you didn't see it.