I think it was 1998 or so? I put Mandrake on my Sony Vaio Pentium II MMX.
I’m trying out Fedora again on an AMD Ryzen 5 system I built last year. Was running Nobara for several months prior. And Mint for about 10 years before that. Prior to that I was on MacOS and/or Windows. I don’t think I had a Linux system at that time.