Hey @rscaife2,
There are two ways you can achieve what you’ve described.
First, with your current setup, you need to create a global block and add its shortcode in a Custom HTML widget. This way, you have a builder editable area below your sidebar. To learn how to use the Global Blocks, please see https://theme.co/apex/forum/t/global-blocks/24723.
The problem with this approach though is you will work with the global block separately. Unlike the second method which I will discuss next.
The second and the one I’d recommend is you use a Blank template and setup a 2 column row.
Use the left column to display your content and use the right column to display your sidebar or widget area. Add a widget area element in your right column.
It should look like this once added.
You can add elements below that widget area including a global block. See https://youtu.be/ej-5rJ_sS30
Hope that helps.