Hi, I'm trying to adjust the child theme of Boost of my site, but I am not an expert in php and get a little bit confuse.

Using Moodle 3.5.4 (Build: 20190114) and a child Boost theme based on the tutorial: https://docs.moodle.org/dev/Creating_a_theme_based_on_boost

I wanted to show the available courses like cards and not like a list. I have searched throw the forum for 3 days, and have follow this other tutorial https://docs.moodle.org/dev/Overriding_a_renderer witch lead me to:

1- In the config.php of my child theme I have added this line: 

$THEME->rendererfactory = 'theme_overridden_renderer_factory';

2- I have added a new file called renderers.php in my root child theme folder, but I'm not able to find where are the pieces of code I have to put here for extending the boost theme and change that part of the front page.

Anyone?

Thank you!