My favorite go-to for new users is Fedora. It's a community version of red hat Linux and i have to say the installer and built-in software should get you most the way through out the box.
My next recommendation is Vanilla Debian V12 Bookworm. I like Debian because it's a rock solid distro that's hard to mess up.
Besides the base OS, consider using either a KDE or Gnome desktop. Either should deliver a solid new user friendly UI.
Excluding people based on sex at birth forces men into women's sports and women into men's sports.
For one, ones ability to express themselves through gender is just more natural than analyzing genomes and less awkward than genital groping to prove your sex.
Two, this wasn't a 9-alarm fire till the start of the decade. Trans people and their involvement with sports have existed far longer than that. Plus if people wanted to give a damn about fairness in sports, there's countless other discrepancies such as the (lack of) amount of funding and fanfare of women's sports that basically are given to those typically driven by men's sports. (Of which have no bearing of how well any athlete can do)
And three:
This should be a society where in good faith, you can determine who you are. I would hate to live in a world where society tells you which box you belong in.