Help! Trying to setup selling websites to members of my community

I have a new WP Multisite installed and granted support access to it already. Here's what I want to do:

Have a webinar, sell websites to my members then direct them here to my website to seamlessly buy a domain name, pick a theme and have a new website they can immediately see then log into and populate with their stuff.

I installed several plugins: Domain mapping, Multisite Content Copier, Multisite Enhancements, New Blog Templates, Pro Sites, WHMCS Multisite Provisioning, WHMCS WordPress Integration.

I purchased a subscription to WHMCS.

Problem: I can't find a single guide anywhere to show me what or how this stuff all works together. I've never seen all of this in action so I don't know what to do next. Is there a guide or article somewhere to help me achieve my goal?