Seeking resources for strengthening Web3 fundamentals

I'm a software engineer with >5YoE making the exciting transition from the Web2 to Web3. While I've dipped my toes into trendy concepts like Account Abstraction, MEV, and Modular Chains, I'm eager to strengthen my fundamentals and delve into the science behind these cutting-edge technologies. My knowledge about these things is very superficial and scattered. I am looking for a roadmap to understand these concepts properly.

I'd love to hear your recommendations on resources, courses, or any insights that can help me build a robust foundation in Web3. Are there any must-read whitepapers, online courses, or communities you swear by?

Additionally, I'm keen on crafting a developer roadmap into the different niches within Web3. If you've navigated this path or have valuable insights, please share your wisdom.