I'd definitely also be interested in hearing how it all works out! Not looking forward to going through these new processes in a few months as well, I've previously just packaged APKs with adt and with one common p12 for all apps, and haven't had to really change that process much over the past 10 years aside from adding armv8 APKs.
Especially for AIR developers who may have never had to touch Android Studio before, it's a lot of changes to absorb all at once, between having to now worry about Android SDKs, converting certificates for Play App Signing, upload certificates, testing with bundletool, etc. The airsdk.dev tutorial on packaging will definitely come in handy, thanks to everyone involved in putting that together!