Well, if you have no clue how the websites work… it might be a bit challenging.
Do you have a domain?
Do you have a hosting package with a host company?
Well if you have both, then just continue on reading here…
http://codex.wordpress.org/Installing_WordPress
After you’ve successfully installed WordPress, hop over to the link moshu provided and learn how to do some other stuff.
It says:
Simple. You login to your admin panel, and by default, WordPress opens up into the Write Administration Panel. This panel allows you to populate your site with actual information! It handles the creation of new Posts and Pages, and the editing of old Posts and Pages. You’ll be spending most of your administration time here, so you should spend a bit of time familiarizing yourself with it.
Where do I login in to the admin panel?
No, it does NOT say that in the installation instructions – READ it carefully:
http://codex.wordpress.org/Installing_WordPress#Detailed_Instructions