I think we have a very different definition of quick, my friend. I've been on Linux for about a year and a half, most of which on Arch and recently on NixOS.
CP/M. Ya got me there. I guess I can say EOS though ( Coleco ADAM ) and Tandy DOS 2.1.
If you don’t want to jump straight into Arch, give EndeavourOS a go. It is only 20 packages on top of the 90,000 you get in Arch ( so, it is Arch ) but it is a breeze to install and is sensibly configured out of the box. Once installed, it is Arch ( don’t let the elitists tell you it isn’t ). It uses the real Arch repos and runs the real Arch kernels. Of course, if you have the time, vanilla Arch may be even more fun.