How to change the main column width?

Hello!

The short answer is, not easily. If you have some CSS experience, you use Jetpack’s CSS module or create a child theme to fiddle with the widgets/margins to make the main column wider. A good place to start is by increasing the max-width on #page and going from there.

WordPress.com actually has a good CSS basics tutorial, if you’re unfamiliar with how it works: https://en.support.wordpress.com/custom-design/css-basics/ It looks like there’s also a free lesson on Codeacademy: https://www.codecademy.com/courses/web-beginner-en-TlhFi/0/1?curriculum_id=50579fb998b470000202dc8b