FYI there is also “Island” (white triangles on blue yellow background) on the Google Play Store which does similar if you don’t want to bother with FDroid.
I use it for isolating work apps, only oddity is having to install a second instance of my favourite keyboard and browser app, and if I want to attach a photo to say Teams, the file picker will show nothing until you switch it to browse personal files.
Programming is the biggest skill you can learn, as it helps with automation and separates you from install clickers. You don’t have to be advanced, just the basics helps troubleshooting when you understand how software flows from the inside.