World Space vs. Screen Space
Your quad is showing up small because you've got it drawing in the range of -1 to 1 at the origin of your scene. To make it draw over the entire scene, you either need to move it along with your camera and make it bigger, or you need to draw it in screen space using pre-transformed primitives. Given that you're not familiar with winding order, I'm going to guess that pre-transformed primitives is beyond you. So for now, make sure you specify the points of the quad as being just in front of your camera, and large enough that it covers the display area. It's not the correct approach, but it'll work for now.
Cheers and good luck!
Thanks for the detailed reply.
How do I specify the size and position of the QUAD?