I'm new here too, most of what I learned was through the Youtube Channel of Power BI, videos are short and instructive and also when you open the Poer BI for Desktop there is a Getting Started page that takes you to the help section with various tutorials and guides.
I wish all training material mentioned wasnt such a deep rabbit hole...maybe that is as it should be...links within links within links leading to other links interspersed with additional chances to login again.
I have created a site dedicated to this very purpose. Check out https://powerbi.tips/ Over the past two years, I have struggled to learn all the little details of PowerBI. This site is my exploration into the tool and what I have learned along the way.
Mike Carlo ( https://powerbi.tips ) mike@PowerBI.Tips