As you have no prior experience in power bi, you should start learning Power Bi from the basics through Microsoft’s free online learning resources. Dataquest.io offers 2 paths in partnership with Microsoft that use Power BI. The first is the Data Analysis with PowerBI path, which is a skill path focused entirely on Power BI. It’s based on the content from the MS Learn website and will help you prepare for the Microsoft Power BI Data Analyst exam. The second path is the Business Analyst career path which is coming soon. It will include the same content, but will also include Excel, SQL, and Python.
I’d also recommend you practice on the Microsoft PL-300 Practice Test as much as you can before taking the exam because practice tests are designed to emulate the exam and have the purpose of giving you an indication of where you are in your preparation and what you need to study further. It will serve as an adaptive companion tool to assess your knowledge and exam readiness to help prepare for the exam and will give you the opportunity to experience a real exam environment. The practice test includes realistic and scenario-based Microsoft PL-300 Questions that cover all the latest exam objectives with explanations and resources where it is required will help in understanding the core concepts required to pass the exam.
You must have solid skills in business intelligence, Python, PowerBI, and the knowledge of implementing an ML model or regression to become an expert in data analysis. Besides, when you understand syntax, use platforms like stratascratch and leetcode to test your skills and practice real problems.