Show only items in this category

Hello, I have a problem. Before coming here, I tried for many hours but I do not find the solution sorry … I wish that on one of my pages (page 1) I access my articles of category 1 and I wish That on my page 2, I access my category 2. I tried with all the widgets (loop of articles, recent articles, …) but I do not see at all where I have to enter the category .. On page 1 I want to have for each article on the full width the photo then the title then a preview of the article with the possibility to see the whole article clicking and that my page 2, I wish to have for Each article the same presentation: photo, under title and under article but with 3 articles by width. Thanks a lot for your help.