In order to install WordPress you would need to login to your cPanel
Once logged in, click on WordPress that is found under the "Softaculous Apps Installer" section
On the new page please click on "install"
You will now see the following page asking you for some information. Please make the necessary changes.
Enter the details you wish to use to login to the admin section of WordPress.
Now it is time to install it. Click on the "Install" button at the bottom.
You should see the following during installation:
Once its done you are now ready to login and start designing your website!
You can follow the link given to you and use your admin user and password that you set up a few moments ago.