I can't install the driver, or when I install it, nothing is visible, I think it's clear
No, it's not clear. The driver installation you do is supposed to be the solution you apply to some problem you have with the graphics card, but you do not specify what the problem is that causes the need to install the driver.
As far as I know, if you have activated the proprietary software repositories when installing Ubuntu, the drivers should have been installed automatically.