TL;DR: If you just care about having something that works reliably then install Debian + GNOME + Software as Flatpaks. You’ll get a rock solid system with the latest software.
About the desktop environment: the “what you go for it’s entirely your choice” mantra when it comes to DE is total BS. What happens is that you’ll find out while you can use any DE in fact GNOME will provide a better experience because most applications on Linux are design / depend on its components. Using KDE or XFCE is fun until you run into some GTK/libadwaita application and small issues start to pop here and there, windows that don’t pick on your theme or you just created a Frankenstein of a system composed of KDE + a bunch of GTK components.