ATTiny 84 interrupt timers

Hey, I want to create an interrupt timer with my ATTiny 84 for a waveform generator which should run at about double audio rate. All of the chip's values and variables seem a bit cryptic to me as they don't seem to be named for a human to understand. Does anyone have a good resource on how to learn how to use interrupts?

try to understand the register names shorthand

PIO_ODR = periheral input/output (output disable register)