Incidentally, I've added Carlos' post to the Tips Archive for future reference. Thanks Carlos.
If I could add any advice to the beginner it would be to spend 6 months here reading before posting a question. During that time research on your own and draw. All the answers to your questions will eventually come to light and if not, by then you'll be more informed on which questions you need to ask in the first place.
This craft requires patience. I used to say the most important tool for a new engraver was a pencil and paper. I think a healthy dose of patience is the first requirement. Then the pen and pencil.
Simmer down Grasshopper!
Layne