2 column blog template

I am trying to create a 2 column layout for my custom blog template in altitude-pro. I've created the new child template called Headline-Blog listed below:

<?php
/**
*
* Template Name: Headline-Blog
* This file modifies the blog template.
*
* @package Genesis\Templates
* @author LikeCatcher
* @license GPL-2.0+
* @link http://likecatcher.com
*/

add_action('genesis_loop', 'genesis_standard_loop', 8);

genesis();

I'm really couldn't find any previous articles of anyone trying to do this. Any suggestions?

What I wist to accomplish is to have several blog pages on different post categories, in a 2 column format with featured pictures. The category part I got.