Where to learn about advanced concepts in blockchain and Defi?

Looking for how to learn advanced topics or learn more deeply about blockchain and Defi? In simple words, I have an intermediate level of knowledge in blockchain but I want to learn more. Not talking about the code here, just high-level understanding.
My goal is to gain a deeper understanding of blockchain so much so that I can understand about complex applications of blockchains in our life and also make my own solutions.
submitted by /u/vromahya
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