I agree that F-Droid is great!

What I usually do is to buy the pro version on Google Play and install it later on F-Droid.

On the other hand I don’t see anything wrong for non tech people to install FOSS apps from the Play Store. The apps are still FOSS

Fun fact: I use NixOS since six years now and at least in the first two years the Arch Wiki helped me a lot to understand the NixOS configuration options.