It takes 20 minutes to install Arch Linux.

This video will give you an overview of all the necessary steps to take.

We install version 2 of Fvwm coming from Arch Linux repositories.
ArcoLinux uses version 3 of Fvwm coming from AUR.

We follow the guide of this page and will compare it with the Arch Linux installation page.

This video will guide you
through Phase 1, 2, 3 and 4
of OUR Arch Linux installation guide
this is an ALL IN ONE installation

In phase 4 we choose our desktop

We can install lightdm, lightdm-gtk-greeter and lightdm-gtk-greeter-setttings but …

we choose sddm and enabled that.

We need to install our desktop now.

sudo pacman -S fvwm

Fvwm provides a config to work with and we decide  to take a look.

We will copy/paste over the default config of the developers.

mkdir ~/.fvwm
cp -r /usr/share/fvwm/default-config/* ~/.fvwm

There is still much work in your configs for fvwm to become a functional and beautiful desktop.

That can be a challenge.