After a bit of a lull in the content front, I recently wrote a blog post on Azure Pipelines YAML on my employer's website. After reading the blog post you will have a decent grasp of how to get started with creating your build pipelines with the "new" YAML format, which I think will greatly benefit your workflows in developing CI solutions.
Check the blog out here:
Finnish version
English version
On top of that I'm also speaking more in depth about this subject at Microsoft TechDays 2020 in March, check the event and my speech out here.