A week training, then 8 weeks in the field checking addresses and then asking impertinent questions.
One of the things asked on the very brief phone interview was "Can you ask the embarrassing questions that may be required?" "Ma'am, I'm a medical professional." "OH yeah, you can do that then. And you'll understand about the confidentiality bit."
I did ask (as in this area it's a very real possibility) if I got shot or a dog sicced on me, was that covered by insurance? Yes, it would be considered a work-related accident. But try really hard to not get shot. Yes'm.