Don’t install Kali, Redox, ReactOS or Linux from Scratch as a beginner. Kali is a pen-testing distro that runs everything as the root user by default. It should not be used for anything outside of testing network infrastructure and should not be installed on anything but a USB drive. Besides all the software that is on Kali is also available on any other Linux distro. Redox is still in its infancy and not very usable on real hardware due to a lack of drivers and support. Similar story with ReactOS, except it’s basically WINE but with a FOSS WinNT Kernel underneath. ReactOS can’t even run 64-Bit applications yet (although there is an effort to get that working). With ReactOS you still get all the baggage and questionable design decisions from Windows, since that’s what it’s trying to mimic. Lastly, Linux from Scratch is a means to make your own Linux distro from scratch. It’s not a framework, or a distro, or a set of tools but a piece of literature.