WordPress is an online, open source website creation tool written in PHP. But in non-geek speak, it’s probably the easiest and most powerful blogging and website content management system (or CMS) in existence today.
You can change your existing website into a blog just by changing few wordpress settings.
Login to your wordpress admin panel. Type www.yourdomain.com/wp-admin in your browser.
Enter Username and Password.
You will see the Reading under the Settings. Click on Reading.
Here you will “Front page displays” on the top. Set the Posts page -> Home page.
For better understanding see the screenshot below.
In this way, you can convert WordPress website into just WordPress Blogging site. See my blog Home page here:- http://bloggingcanker.com/ and like us on facebook for more wordpress tips.