Educational resources needed

I have some spare time that I would like to spend on developing educational resources for ethereum + defi (for free). I have deep knowledge in all blockchain related tech and finance, but am wondering where you think the largest gaps are at the moment in terms of educational material. Some ideas I've been playing around with so far:

• A website with financial calculators for typical defi operations under e.g., different future price assumptions (APY, impermanent loss, options, ...)
• A website/book starting from primitives such as stablecoins all the way up to more advanced concepts such as liquidity farming, explained at different levels (e.g., ELI5 => financial math => solidity deep dive). Some books exist already, but the ones I found were pretty horrible (e.g., DeFi and the Future of Finance by Harvey).
• A library with common strategies to manage personal funds in a decentralized way.
• A copy of common defi websites that I manage on one of the testnets so that everyone can try out these protocols without needing to spend excessive amounts of funds / do KYC.

There is a vast collection of good youtube materials out there already so I'm not thinking to go there at the moment.

Anything else you can think of? What would *you* like to see/need?