Edit homepage content to excerpt

Hi, first thanks for this great theme, is such clean and powerful.

My question is how to edit the homepage style posts display, i created a child theme to work, and i want to change how the posts display on the homepage, i want to change from “the content” to show a post excerpt, can you point me whats the file to edit?

My test page is this: https://classificadosinformatica.com/wordpress/

Thank you very much.