I'm old school, learned drafting a long time ago, well before CAD but I took an evening course in CAD as soon as I knew it was around (AutoCAD 10). Loved it and have been using CAD ever since.
Knowing how to draw and sketch is very useful, as is knowing how to use a lathe and a mill (I'm also a machinist). I feel that it really speeds up my CAD drawing. Once the serious drafting begins though, the paper and pencil get left behind very quickly! You'll soon learn a bunch of shortcuts that help you draw quickly with CAD, just keep practicing and trying out the tools.