Depends on the use case of the person operating the computer really.
I recently installed EOS (with LXQt), and all i really did was install it using the GUI, install some of the app selection offered in endeavors introduction GUI (including flatpak), saved the webadress of arch repository, aur repository, and flathub.org, and then learned
yay -S (package name of aur and arch repository)
copy-paste flatpak install command from flathub.org. installed everything i used. Then i searched how to list the packages in flatpak and pacmac, how to uninstall both, and voilá, i was ready and had everything i ever used, with less than 10 terminal commands.