Using the theme’s default listing style

Hello, first of all, thanks for this useful plugin. And I would like to state that I am a beginner in coding. I use the same listing style for category, search, archive pages in the theme I use. I want to use the same listing style for the “Display Posts” plugin, what should I do for this? https://displayposts.com/2019/01/04/use-template-parts-to-match-your-themes-styling/ Unfortunately I couldn’t understand anything from this article because I’m a beginner.