Good advice from Mark.
There are also some very useful primers here:
http://www.adobe.com/motion/primers.html
footnote:
DVCPro is essentially DV with a higher bitrate (50 Mbps instead of 25 Mbps). A very good standard-def format. DVCProHD is, um, hi-def, and quite a nice hi-def format. By the way, as you delve into all this, an important distinction is bps vs. Bps (notice the uppercase "B"). A lowercase "bps" refers to bits per second. Uppercase - Bps - refers to bytes per second. There are 8 bits in a byte, so Bps is eight times "bigger" than bps. Makes for some extra math when calculating storage and the like. An example: DVCPro at 50 Mbps (mega
bits per second) is approximately 6.25 mega
Bytes per second.
-Jeff