Here is the short version of how to install a simple Herbie website using a website template.
composer create-project getherbie/start-website mywebsite cd mywebsite/web php -S localhost:8888 index.php
After that, the website http://localhost:8888 can be opened in the browser.
For the above commands, however, basic knowledge of using the console and Composer, the dependency manager for PHP, is required. But it's really not witchcraft and shouldn't be too difficult.
It gets more exciting when you customize the layout, add new pages, or edit content.
If problems have already occurred at this point, the first thing you should do is check all system requirements.