Showing image + title + first words of my posts on Home page

I'm trying to do something like on this page https://demo.getgrav.org/blog-skeleton/
After the main image there are image + title + first words of all posts of my_category
Do I have to use a plugin? Or something like a Page Collections, if yes, I don't understand how to do it.

Did you try the approach, which is on the Blog skeleton? What exactly didn't work for you?

Thank you @Karmalakas Effectively this could be a solution.
But I was trying to find a way to have all my post of a specific Category automatically like that.
Maybe the GLightbox Gallery. do it but I'm not sure

I'm a bit confused. What's the actual problem? Is it that you don't know how to show image + title + intro or that you don't know how to show items only on a specific category?

Not sure how lightbox would help in any of these cases 🤔

I was thinking to have a

• a folder/Menu with all blogs pages from category 1
• an other folder/Menu with all blogs pages from category 2
• and so on
  And publish automatically image + title + intro of a the blog pages from category X

But maybe it's easier to put my blog pages of category X on the home page as the Skelton model do

Are you referring to category as a taxonomy category? There are multiple ways to achieve same result on Grav

Yes a taxonomy category

What do you have so far and how is it different from the expected result?