1. Install WordPress
If you don't already have a domain and hosting account, you'll want to be sure to purchase those. For hosting, I recommend Siteground. The following instructions will be how to install WordPress on Siteground, but it should be somewhat similar regardless as to who you get your site hosting from.
Log in to your account, navigate to your CPanel, and look for the WordPress Installer.
Click the blue Install button, and follow the prompts to choose your domain, set your site name, login information, and more and then click the Install button at the bottom of the page.
Once you're done, you should receive an email with the details of your new site, as well as a link to where you can log into your site.