Unfortunately, the scientists who study actually brains have all sort of interesting models but ultimately very little clue how these actual brains work at the level of problem solving. I mean, there's all sort of "this area is associated with that kind of process" and "here's evidence this area does this algorithm" stuff but it's all at the level you imagine steam engine engineers trying to understand a warp drive.

The "open worm project" was an effort years ago to get computer scientists involved in trying to understand what "software" a very small actual brain could run. I believe progress here has been very slow and that an idea of ignorance that much larger brains involve.

https://en.wikipedia.org/wiki/OpenWorm