When I was first looking into Linux I asked the only friend I knew who used it and he unironically recommended me Arch...
A year later I actually gave Arch a try, but by then he apparently hated Arch and switched to Gentoo and I stopped asking him for advice at that point.
Gentoo obviously :
To install, easy just get this iso, with no GUI, then whip your hard drive, create partition, copy the Linux core, config your core based on the hardware technical details of every components you have and will use, compile it, add extra core drivers, compile them, add all the software you'll use to get a GUI (Desktop environment), compile them,. Now you can finally restart without usb stick! Add all the software, configure and compile them. And for every update of every software you may check the details to be sure it doesn't break your config.
Easy no? It just took you a month to get all the steps right!
Ya there's Arch. There's NixOS. There's still Slackware.
But have you heard of 9front?
9front is useless. You won't be gaming or working with it.
Mostly, you'd learn how operating systems are constructed.
Or DoomOS or DoomLinux. It's a basic linux system where DOOM is the shell.
I forked this and tried to get it running. Learned some interesting things. Still doesn't work for me. :] https://github.com/fl64/DoomLinux