After purchase, was directed to download. However, don't know how or where to find the easyworship interface, the actual screen where all of the work is done, or how to place the icon on the home screen.

The download files can be found at this page. See this page for installation and setup instructions.

Please note that EasyWorship hasn't sold ANY version of their software for several years of years. They only sell subscriptions and stopped selling subscriptions and support for Version 6 a couple of years ago.  Please verify what version you purchased a subscription to and download accordingly.