Start with Power BI for Data Analytics - Full Course for Beginners (505 min, Luke Barousse), then Power BI from ZERO to Your First Dashboard (in 20 Minutes) (23 min, Leila Gharani). All 407 lessons here are free, from the teachers' own official uploads. You'll need laptop stand, noise-cancelling headphones, second monitor and a few more basics (about $270 of kit). The book to keep beside you: Storytelling with Data by Cole Nussbaumer Knaflic.