If WordPress can’t find the wp-config.php file on root directory then, it will start setup or you can try to create and modified the wp-config.php file manually.
Softaculous App Installer : This is a very easy and fast step to install WordPress Using with Softaculous App Installer. In cPanel some of apps installer are available bottom of page.
In your local server you can easily install WordPress in this easy steps. Need to create database-name, username and password for setup.
Wordpress is a Content Management System(CMS) or you can say software. Worpress is free and Open Source application based on PHP and MySQL, it is used for create website or app.