I snuck away for an hour after a spot of work and learnt how to do curves with point manipulation and grease pencil. I give you: SQUIGGLES!
Definitely good fun. I'm enjoying the course, it gives me a little bit of structure to work with.
Next step is working with 2D, I don't think that's more grease pencil but using 2D reference art; which will be handy because that tends to be how I work.