So, I got it working, I just ended up using optimus switch.
I started following this guide
https://forum.endeavouros.com/t/optimus-switch-another-solution-for-optimus-laptops/7593
Arfter runing
pacman -Q | grep nvidia
from the first steps, I fount out that even with the nvidia propietary install, no drivers where installed, neither the nvidia-installer-dkms.
So I started by runing
sudo pacman -S nvidia-installer-dkms
and runing the dkms by force
sudo nvidia-installer-dkms --force
On step 8, I didnt restart, I run
pacman -Q | grep nvidia
again, and manually remove all entries but
nvidia-installer-common 1.3-1
nvidia-installer-db 2.5.8-1
nvidia-installer-dkms 3.5-1
did a reboot and ended up with “Reached target Graphical Interface” a blinking cursor so I started the system on TTY 3 and went ahead and installed
nvidia-390xx 390.151-1
nvidia-390xx-dkms 390.151-2
nvidia-390xx-utils 390.151-2
and thats it, I got it working.
Thanks to all for the help!!!