Hi @bradhip
You can manage the layout of page content as explained in our Page Layout documentation. Page layout consists of the main content of the page and the sidebars. The number of sidebars can be registered in the same customizer section as well. Once you register the number of sidebars you want Publish the changes and reload the page. New sidebars will be visible under Customizer > widgets
as Sidebar 1, Sidebar 2…
We have also answered your question related to sticky sidebar under the previous question you asked.
Hope that helps! Please let us know if you face any issues.