challenge- 'revealling' posts list

hellow.
could somebody tell me how do i make the list of my posts (in my home page) and the search results, to show only title and categories , and when i click it it will open (reveal) the full post below the title (and all of that happenes inside the whole list) . there must be a theme or plugin for that if not,how how do i make it? it’s not just a challenge, it’s very necessary for my blog.