lf-araujo You can either disable lightdm and start sway from tty, or install sddm which can start sway wayland sessions.
Disable lightdm:
sudo systemctl set-default multi-user.target
sudo systemctl disable lightdm
sudo systemctl enable getty@tty1
sudo systemctl disable getty@tty2
Or switch from lightdm to sddm:
sudo systemctl disable lightdm
sudo eopkg rm -y lightdm
sudo eopkg it -y sddm
sudo systemctl enable sddm
can't say anything about nvidia though.