Honestly people who can’t open a PDF and refuse to learn shouldn’t use a computer in the first place.
But, assuming most people aren’t complete morons and can actually do stuff if they decide to sit down, Google how to do it and actually do it instead of declaring “I am stupid” and not even try, then even just telling or better yet showing people there’s an alternative to throwing your perfectly functioning laptop and buying an expensive new one will go a long way to get new users and save some e-waste.
Of course, installing an OS isn’t easy, for linux specifically the hard part is entering the BIOS to disable secure boot and then go into the boot menu to select the USB. After that it’s a lot easier. Of course they can also be directed towards Linux computers, like system76’s, or Tuxedo’s or Laptops with Linux’s if necessary.
Naturally to get Linux to dominate the desktop we need the EU to say “know what fuck you, your PC can’t come with a preinstalled paid OS” paired with people learning Linux is an option when buying the PC and seeing that it is free vs what like 135€?