At the end of this wizard, you can install or launch [archdi](https://github.com/MatMoul/archdi) (Arch Linux Desktop Install) to install and configure desktop packages.
First, boot with the [last Arch Linux image](https://www.archlinux.org/download/) with a [bootable device](https://wiki.archlinux.org/index.php/USB_flash_installation_media).
Then make sure you have Internet connexion on the Arch iso. If you have a wireless connection the `wifi-menu` command might be useful to you. You can also read the [Network configuration](https://wiki.archlinux.org/index.php/Network_configuration) from the Arch Linux guide for more detailed instructions.