If you are still lacking good content to read in 2020, what about 9 books about Azure? After reading and understanding all books mentioned in »The Top 9 Microsoft Azure Books You Need to Read in 2020« you should have a pretty deep knowledge about Azure.
Ever wondered »What is the most cost-effective way to run SQL and Windows Server in the cloud?« would be? Looking at this article you will have good starting point for your decision.
Sometimes components available in Azure seem to do similiar things. When choosing between the right way to handle logs, alerts, change feeds and webhooks and are not sure whether Event Grid could be right for you, you should have a look at »How Azure Event Grid is different from logs, alerts, change feeds and webhooks«.
Do you use your Azure shell on a daily base and wondered whether it would be possible to optimize your personal workflow? Then have a look at »Azure Cloud Shell + zsh, oh-my-zsh, tmux, and badass terminal!«.