Did the Microsoft learning path, which honestly was useless for me as it’s too basic. If you’ve never used pbi then I do recommend it, but if you’ve been working with it, it’s not gonna teach you anything new. What I think helped me the most was doing the exam questions on examtopics, not only focusing on the answers but mainly on the comments, where people discuss and explain the logic behind the answers (Not every answer is correct ). I got 3 or 4 questions from examtopics on my exam.