"ESP32 for Busy People" explains exactly what ESP32 is, teaches you about the different modules and how to use it for simple components such as buttons and LEDs.

[tech] got tired of having to push a button to prepare the ESP32 for programming, and decided to solve the problem. The solution comes via another microcontroller, in this case an ATtiny9.

Launched on IndieGogo a few months ago after 2+ years in development, Crowbits is a STEM education project that leverages both the Arduino and ESP32 boards to teach logical thinking and programming.