If you have young daughters, though, the Tiffany Aching books are a great place to start.
Partly (mostly?) for the spectacle of me trying to read a Nac Mac Feegle accent :)
FWIW I only recently learned that "crivens" is maybe a real expression, a much-shortened form of "Christ defend us". In the same way as "God blind me" reduces to "blimey"...
But it's an easy and quick decision / try: Discworld to me is a bit like Hitchhikers guide to galaxy, where I tell people to just read the first page - either you'll be laughing and hooked, or go "huh?"; either way it's not one of those books where you need to read 27 chapters and get to know characters etc before you make up your mind. It's a specific type of humour that not everybody appreciates, but those who do appreciate it rather quickly.