Hi and welcome to the forum.
Lots of information and support here so ask away ;-)
To answer your question "
how do they get the blade started in internal work?", yes you drill a small hole just big enough to accept the blade. Then un-clamp the blade (at the top), feed the blade through the hole, then re-clamp it again and carry on with the internal cut. For other internal cuts this process is obviously repeated. Phill is right, get yourself a drill press. They aren't particularly expensive and have many uses. By the way, it would be more efficient to drill all your holes before you sit down to start scrolling for better workflow ;-)
If however, you mean veining? This is like feathers for example or the attached picture, then here are some good tips
http://www.scrollsawvillage.com/article ... g-tips-r47
Good luck
Barry
