Same boat, my computer is basically the computer my wife built probably about 12 years ago before we got together, it was pretty beefy for its time. I basically stuck her old components in a new box (and also stuck a newer graphics card in it because I got a really good deal on a used 2060)

Still manages to run most games out there on acceptable (to me) settings.

Made the switch to Linux about a week ago, no major issues, some things are arguably running better now. It's not without its hiccups but so far things have gone pretty smoothly.

EDIT: went with Mint over Zorin though.