The Linux ecosystem isn't as splintered as people think it is. Yes, there are technically lot's of distros but most of them are really just derivatives that don't add much.

The vast majority of Desktop users just use Debian or Debian-based distros like Ubuntu, Linux Mint and so on.

So in the end, it is just a matter of whatever pre-installed software you get. It used to be that vanilla Debian was a bit hard to use but I don't think that is true anymore. (Though I still recommend Linux Mint for the absolute "just works" experience.)

For 90% of users, they are not going wrong using Debian or one of the popular Debian-based distros. After that is is basically just a matter of specialized needs.

Want to make administering your system a hobby and part of your personality? Have some Arch.

Need professional support? OpenSuse.

Need reproducible builds? Nix/Guix.

Need a minimalist distro that runts on potatoes? Puppy Linux and whatever else.

Wayland vs X11? Systemd? If you know these words, you are already way too deep in the rabbit hole.