My kids spend a lot of time in front of the computer. How do I know what they're doing? They don't answer my questions.
It's complicated. my kids don't say everything either
You can install a Mac keylogger https://www.refog.com/mac-keylogger.html on your computer for control. This will allow you to fully know what information and to whom is being sent from your computer. So you'll know everything that's going on on your computer
You need to occupy the kids with something else. This is to distract the kids from the computer. Children spend a lot of time on the computer as a single hobby.
I recommend you connect android set top box https://www.infomir.eu/eng/products/android-stb/mag425A/ . So you get a lot of different TV channels and the ability to watch different movies. For children you can choose scientifically informative or children's TV channels.
If kids come in to play, MAG425A gives access to the Google Play Store for Android TV and supports Android-compatible wireless gamepads BLE.
There is a lot of software out there that can help you recover lost or damaged data, but if you want to avoid additional data loss, I recommend checking out program Disk Drill It should have all of the features you want, and it was designed with user friendliness in mind, making it simple to use for novices.