There are two ways to install WordPress, either do it manually via their website or do it through the application.
Here's how to install via the application:
First, log in to your control panel, i.e., cPanel.
After you have logged in, type "WordPress" in the search field at the top.
Then click on "WordPress-manager by Misshosting" that appears in the search field.
Next, click on the blue "Install" button on this page.
Select the domain name you want to install WordPress on.
Scroll all the way down and click on "Install".
And that's it!