dont worry, thats what being a noob is all about (your allowed to make mistakes lol)
right next thing - right click anywhere on the desktop and click on properties, and then the settings tab.
Underneathe the picture of the monitor will be the name of the graphics card you have. what does it say?
It will be something like defult monitor on NVIDIA GeForce4 MX 440 (which is what i have)