Just wondering b4 I go any further!

I am a complete novice when it comes to this woman's music. I had the pleasure of seeing her perform live several years ago. At the time, I had no idea who she was but she was fantastic. The music was inspiring and passionate. I told myself I would get to know her music better, but unfortunately, I've never done that. Maybe I need to do it now seeing as there is way too much shit out there. I wouldn't know where to start if I were to buy her records though. Can you help me choose what to start with??