How to enter system after Nvdia driver installation?

[Roger]

> Two systems are fine. But my question is how to improve fedora. If patient enough, I can reinstall the whole system.e
>
> Do you suggest Ubuntu have a better support for nvidia driver?
>
Not at all
I use both. Both install and just work.
Improving Fedora depends on what you want to do, what apps you want to run.
Try Fedora with Nouveau and see if it behaves. If not then your video 
may have issues.
Roger