I highly recommend Arch-like distributions for learning Linux. The downside of Arch is coming with Systemd, which is rumored to be a NSA project for standardizing and adding backdoors to Linux distributions. Linux distributions as Alpine, Artix, Void, Gentoo avoid Systemd. My preference here is between Alpine (for containers) and Artix (for workstation). But currently the distro I like/use the most is NixOS for it's enhanced productivity.