If you're looking for a resource which breaks the complexities of DeFi down into easy to understand and digest pieces you're in for a treat subscribing to Kerman Kohli's Newsletter "DeFi Weekly".
For folks looking for videos, there's also his YouTube Channel. In his videos, Kerman sits down with his iPad to decompose and explain the most complex DeFi protocols out there. Starting with a blank page he'll walk you through the protocol designs, tokenomics and usage of products like Maker DAO, Compound and Synthetix.
- Kerman Kohli