Found in 2 comments on Hacker News
pugio · 2019-08-05 · Original thread
For a truly "from scratch" and deeply empowering introduction to the basic notions in calculus (and all mathematics), I've found nothing better than Burn Math Class[1] by Jason Wilkes. It assumes nothing but basic arithmetic, and proceeds to guide you through how to invent maths for yourself.

[1] https://www.amazon.com/Burn-Math-Class-Reinvent-Mathematics/...