Download the WordPress archive from the official website:
https://wordpress.org/download/

In your hosting control panel, upload the archive to the Files section and extract it.

Rename the file wp-config-sample.php to wp-config.php. Open it and specify the database name, username, and password.

In your browser, go to:
http://<your-domain>/wp-admin/install.php

Complete the WordPress installation by following the on-screen instructions.