Welcome! I'm with you on learning style. Youtube videos, especially when they don't get right to the point, are really frustrating for me too. Sometimes I just want to reach into the video and... well... nevermind.
There's some good information in this thread started by @rlithgow1. There are video links in there but there are also lots of links to helpful reading material. I'd definitely take a look at the zigbee and zwave mesh articles. Even if you have a lot of ST experience they're good reading material. It was written before webcore became part of the native HE offering so I'm not sure he covers it so I also included a link to the announcement and a bunch of supplementary material.
And as always... reach out to the community if you have questions. Chances are someone has seen the issue before and knows how to resolve it. And there are a LOT of ST refugees.
