1-Divide your row in wo columns
On each column place a Custom headline element left aligned. Turn On Accent.
That is it.
If you want to add text to the left side you add a text element, if you want to add a form to the right side, you need to go to WP Admin Dashboard > Addons > Install contact form > Create your form > Than go back to Cornerstone and add a Contact Form 7 Element.
Hope that helps
Joao