Can't figure out correct grid settings

Hi there,

I’ve been struggling to figure out how to set up this grid correctly for a few days now and need your help. Attached is an image of the design I’d like to achieve.

I’ve tried every single setting but can’t figure out how to set the height correctly. I want to have a total height set for the entire grid (which should be the height of the left column content, and then I want everything else the be automatically sized accordingly. I feel like I am running around circles so would really appreciate some support.

How would you set this up correctly?

Here is my site Read-Only: LINK