Softaculous installs a full WordPress site in a couple of minutes.

1. Log in to cPanel.
2. Go to Software > Softaculous Apps Installer (or WordPress Manager).
3. Find WordPress and click Install.
4. Choose the domain and protocol (pick https:// if your SSL is active).
5. Leave the directory blank to install at the domain root.
6. Set your site name, admin username, a strong password, and your email.
7. Click Install.

When it finishes, you'll get links to your site and the admin login.

Important: Don't use "admin" as the username, and choose a strong password — this is the most common target for attacks.