Sure! The easiest way is to use a web client, like the one you can find
here.
The web client is a program that helps you connect to the IRC network, just like how Skype connects you to your friends. Clients can also be downloaded, and they tend to take up less RAM than a web client, but they're harder to set up.
After you get the window open, fill out the fields so that it looks like this.

You can, of course, change the Nickname to whatever you like, and don't worry about the auth to services box, just leave that unchecked.
After you fill out the captcha, and hit connect, you're in! Don't be afraid to say hi, there's usually someone around who's up for some chat.