In preparing for the SC-100 Microsoft exam, one frequently referenced resource I've come across is the Microsoft Cybersecurity Reference Architecture (MCRA). It's an absolutely brilliant set of concepts, architectures, diagrams, and workflows but there's just one issue: It's a bit of information overload.
I recently came across a nice video summary of the MCRA. My recommendation to fellow exam candidates is to start with this first. It makes the rest of it way more easy to digest.
Check it out if you have a spare 8 minutes.