Don't panic. I'm not an expert, but I'll try to help you as best I can.
During the installation (and I did it as you told me), I was told that it wouldn't be possible to install the driver with something called Nouveau active, so I followed the instructions to disable that. After that, the installation went on and finished and I rebooted. And now the resolution is terrible, unchangable, and I can't delete the file that disables Nouveau...
As they say, "Ya done good,son". The same thing happened to me.
Edit3: I managed to remove the file blocking Nouveau and rebooted but nothing changed]
I hope you haven't removed the proprietary driver yet. I think when mine first came up, it had a resolution of 800x600, which actually made it almost impossible to see the menu button at the lower left portion of the screen, but it was there. I slowly moved my mouse in that direction and when I saw it move just out of sight, I clicked, and it brought the menu up, where I could read it and use it.
Let's go back to the terminal for a moment and install another program, well use TTY2 again, just like the last time -> Ctrl-Alt-F2.
When you get there login. We are going to use apt to install some programs. First, let's make sure your repository listing is up to date, issue the following command:
sudo apt-get update
It'll ask you for your password, then you'll see it go out and download a number of files. What it is doing, is getting a current listing of all files available for you to install. Once its done, we'll search for the files we are looking for. In my system, I installed the nVidia X server configuration utility. Quit honestly, I just looked, and I have several different versions installed, and I can't tell exactly which one I'm using. Issue the following command:
sudo apt-cache search nvidia-settings
Here's what I see when I do this:
sudo apt-cache search nvidia-settings
[sudo] password for bill:
nvidia-settings - Tool for configuring the NVIDIA graphics driver
nvidia-settings-experimental-304 - Tool of configuring the NVIDIA graphics driver
nvidia-settings-updates - Tool for configuring the NVIDIA graphics driver
sensors-applet - Display readings from hardware sensors in your Gnome panel
nvidia-settings-experimental-310 - Tool for configuring the NVIDIA graphics driver
I'd suggest that you begin with trying the non-experimental version first. If that doesn't work, you can always come back and try the other. I'm also going to have you install any packages that are recommended. These aren't strickly necessary to make things work, but sometimes can be helpful. What we'll be looking for are the packages nvidia-settings and nvidia-settings-updates. Automatically these will bring in any other package they need. After this command, you'll be presented with a list of packages to install, telling you how much will be downloaded, and how much space will be used. When asked if you want to continue, answer y.
sudo apt-get install --install-suggests nvidia-settings-updates
You do not need to logout of this terminal at this time, if you don't want to. The only reason I suggest staying logged in, is in case we have to go back and try a newer package. If evrything works OK, you can log out and switch back, or you'll automatically get logged out the next time you reboot.
If that command completed OK, with no errors, you should now have installed the nVidia progam to set up your screen. Switch back to the graphical terminal -> Ctrl-Alt-F7
As I said I did, move your mouse into the lower left corner and click, see if you can bring up the menu selections. In my system, listed alphabetcally under preferences, I have a program called NVIDIA X Server Settings. If you find that, you can start it and should be able to configure your screen so its more useable.
If that one doesn't work, go back and install the experimental version, from the terminal, and give that one a try.
By the way, in *nix you use the "man" command (short for manual) to see the help files. If you want to learn more about the commands I've told you to use, or any other command, you would issue the command man followed by the name of the command you are trying to learn about. For instance, the apt command:
It will bring up an entire file to read how to use the command. You move through it, a page at a time, using the space bar, or a line at a time with the enter key or down arrow. The b key will move you backwards through the help file.