bill-mvp I need to dig more into the framework and how to extend it with the extensions :-)
No need to do any extending except through the admin pages. Go to System / Extensions or Updates to see what is available. Extensions will show default and sometimes necessary extensions that are light colored if they are not installed and grey if they are installed. Click on the light colored extension to trigger the install process for the extension. To see other extensions that are available, just look on this site’s Marketplace. Any extension listed there can be installed by typing the name in the Updates / Browse Extensions page.