Sounds like you need to write an app to do this. It seems you want to aggregate data from multiple sources, keep secret, then send.
I’m tech inclined, but not a developer, lots of low/no code solutions should let you get pretty close fairly easily.
I’ll bet you could use a jobs site to “rent a developer” and it wouldn’t be too expensive.
Or find a 3rd party to collect and schedule the email.
You nailed it. It’s a part of the solution and shouldn’t be a weapon. Trust, guide….verify. You’re raising a “being” hopefully with the intention of being a self sufficient adult, not an over grown child. We have to help prepare them for this world.
I log DNS on all devices. This helps me see if stupid stuff is happening, or if somehow the refrigerator managed to obtain an internet connection.