Recommended · for some experience
Programming the new ATtiny from Arduino using UPDI [Beginner Tutorial]
Why people recommend it
bitluni shows how to program newer ATtiny chips over UPDI using the Arduino IDE and an Arduino as programmer, useful for small, low-current projects.
Watch for: Written for ATtiny; other UPDI chips may need changes
In their words
I'm using tutorials like this one that does the same thing but instead of Arduino Nano Every he wants to program an ATtiny.
Miguel on arduino.stackexchange.com, Jul 2020. CC BY-SA.