The wobbly lines you're getting is probably due to your hand shaking slightly, try practising faster strokes. The faster the stroke, the more a shake...
Yaes sparrows! I love those birds. They swarm my garden a lot. Never coming alone, always bringing the entire family (and sometimes extended family)....
I spent about 5 hours yesterday trying to animate a weapon (Gunz' axe) for UDK, then when I export it all, it appears that UDK doesn't like my object...