How do I change the default front page content or style?

 

The frontend is basically HTML, you can find and edit the files and contents at resources/views/home/index.blade.php and it main stylesheet can be found at css/frontend_style_default.css and css/frontend_style_blue.css, this stylesheet is where you can change colours and others.

NB: Always create a backup of your files before editing anyting so that you easily roll back.