I passed DP-600 today. Will's Classroom videos certainly helped, as well as all the MS Learn modules and practice tests. It felt like my test was mostly Power BI DAX (and I'm not a Power BI guru by any means), with a smidge of Python and SQL sprinkled in just to keep your syntax mixed up. I took the test at a Pearson Vue testing center at a local community college. They had voting set up right next to the testing center, which certainly created chaos for those of us who were searching for the testing center, but was also rather convenient so I could cast my vote immediately following passing the test.