To get started with Librarian, first you'll need to bootstrap a new application using Composer.
From your development machine, where you have PHP and Composer installed, run:
composer create-project librarianphp/librarian myblog
Once the dependencies are installed, you can run Librarian with the built-in PHP server:
cd myblog php -S 0.0.0.0:8000 -t web/
Then you can access the app from your browser at
http://localhost:8000. You'll see a page like this: