Once you are on the Insights home page, you will see a purple plus sign icon on the bottom left of the page. Hover over the icon and click on "Create New Catalog". On the Catalog pop-up, you can title your catalog and select your organization from the drop down menu and click Submit.
Accessing your catalog via the Insights home page:
After creating your catalog, your Insights home page will have the name of your Organization and your titled catalog. Select the gear icon on the bottom left catalog frame to access your catalog.