Make sure to be logged in your user and not as root when running this commands to not cause any problem later on.
sudo pacman -Syu
to make sure everything is up to date, than
sudo pacman -S xorg-server xorg-xinit
sudo pacman -S i3
Now we have i3-wm, i3blocks, i3lock and i3status
The basics are, a terminal, a browser, a file manager, an image viewer and a video player, an app selector, a login manager
xfce4-terminal -> terminal
librewolf -> browser
thunar -> file manager
thunar-archive-plugin -> to unzip inside thunar
thunar-volman -> to manage external devices like pendrives inside thunar
feh -> image viewer
mpv -> video player
dmenu -> app selector
lightdm -> login manager
Since I'll be installing packages from AUR I'll use Yay for it, and thus I need to install git and then clone yay
sudo pacman -S git
git clone https://aur.archlinux.org/yay.git
cd yay
makepkg -si
yay -Syu
and then install everything
yay -S xfce4-terminal librewolf thunar thunar-archive-plugin thunar-volman feh mpv dmenu lightdm
sudo systemctl enable lightdm
reboot
echo "exec i3" >> ~/.xinitrc
to add i3 to xinit
startx
enter
to generate the config file
win
or alt
as the leader ($mod) key (choose what you like)