A lot of these descriptions are very specific. It doesn't matter what kind of computer you have or what tools you use. You just need a computer, a text editor, and to choose a language to start in. I highly recommend Python. Its a really simple one to learn and is great for web dev.

Download it here: http://code.enthought.com/download.shtml

And here's a nice beginner's guide: http://wiki.python.org/moin/BeginnersGuide