@eldiosx Thanks! I use Nvidia, I know it's way harder if you have to install Nvidia's propietar drivers. I'd rather not use secure boot but stinking League of Legends demands it if I want to secure boot :(
To avoid headaches with Nvidia, use Fedora, it will support secure boot, the only bad thing is that depending on how the GPU behaves you have to give up Wayland and use X11, but in principle try with the official drivers that Fedora from Nvidia installs and search help to ensure that it has been installed correctly with secure boot 
@teaduckie OpenSUSE supports secure boot too, in both version the standard release Leap variant and the rolling release variant Tumbleweed.
@teaduckie I like the Tumbleweed variant combined with KDE Plasma. This distro achieves a good balance between being up to date and stability.
@teaduckie
Debian for stability and software compatibility.
Fedora for the latest updates and driver compatibility.
Arch to customize your experience step by step.
All 3 can be configured to support secure boot and support flatpak