Is it possible to customize the blog page to minimized level?

Hi, noobs here

Is it possible to customize a blog page, which list out a single category of posts, but with some special layout? If yes, which php file should I dig into?

(1) Remove all author / date / time / reply blog-like information
(2) Remove all space / line / bubble whatever anything between each post
(3) I want there is only a single dotted line between each post content

like this

[Header]

[post 1 content]

———————————

[post 2 content]

———————————

[post 3 content]

———————————

[post 4 content]

———————————

[Footer]

Thank you