[WhiskeyTangoHotel] wrote in with his newest clock build — and he did warn us that it was minimalist and maybe less than useful. Indeed, it is nothing more than a super-cheap ESP32-C3 breakout board ...

Copy the libraries (e-paper/arduino/libraries) of Arduino demo code to the libraries directory of Arduino IDE. (C:\users\username\documents\arduino\libraries by ...

You mostly do not need to worry about pitfalls of concurrent processing (races, deadlocks, livelocks, resource sharing, etc.). The fact of cooperative processing takes care of such issues by design.