I give some high level overviews with a few details on the important parts in my videos here:
https://www.youtube.com/c/adobecoldfusion/videos
"Exploring CF Administrator: pt1" and Exploring CF Administrator: pt2". I focused here on CF2021 (so for 2018 you can ignore the package manager and PM CLI stuff).
Keep in mind though, the admin is immensely powerful, has a ton of features and is occasionally a bit... well, difficult to figure out unfortunately.
Adobe ColdFusion Dev Week starts Monday. There is not a straight up, pure CF admin talk, but I think the following might give you a pretty good insight:
Monday: Charlie Arehart's talk, Brian Sappey's talk
Tuesday: Ketki & Nikhil's talk, Pete's talk, Giancarlo's talk
Wed: David's talk
Thur: Aditya's talk
Fri: Mike's talk (if your team uses API manager)
Of course, I would recommend you watch ALL the talks of course, and they will all be available on replay. Signup here to get access to the live talks & the recordings afterwards:
https://adobe-coldfusion-devweek-2022.attendease.com/registration/select