This is a step by step tutorial for the total beginner, using your webcam and the sharpcap software, this should allow you to successfully image the moon.
SharpCap is a fairly comprehensive webcam and Astronomy camera capture tool. It is primarily designed for astronomical use. I wrote it because I got fed up with the awkward control over camera settings in programs like Amcap, Open Video Capture, etc. The main goals were to be easy to use when observing, and to help avoid mistakes like capturing with the wrong resolution or camera settings, or overwriting an existing file accidentally. Read more