About the_minimum

This theme is free but some strings are attached

If you don't know how to use Jekyll go Jekyll page
Most of things you can do with this theme is presented at _posts/001-post-example.markdown
If you want to use image in your article, theme includes jekyll-postfiles plugin go visit the page to learn how to use it
If you want add styles, you should edit style.less. if you need to add stylesheet then remember to put stylesheet file name in master.css
If you need to know what is LESS then go to http://lesscss.org/
If you have questions, you can do so at issue page