Setup a fresh Linux Arch install

Download ISO, burn a Live USB stick and boot into the Live USB

Download Arch iso from https://archlinux.org/download/.
Burn iso to an Arch Live USB stick using Rufus https://rufus.ie/ (Windows) or Gnome MultiWriter (Linux) or Balena Etcher (Mac).
Boot into the Arch Live USB stick.

Download and run install script

Full guide here: https://github.com/MatMoul/archfi

Download the script with from the command line:
curl -L archfi.sf.net/archfi > archfi

If SourceForge is down, use this instead:
curl -L matmoul.github.io/archfi > archfi

Finally, launch the script:
sh archfi

Then follow the on-screen instructions to completion.