This tutorial is aimed at getting some instant gratification from your WS2812 LEDs (trade name: NeoPixels). I’ll briefly cover a bare-bones setup for Arduino.
The full tutorial for this video (with images and step-by-step tips) https://core-electronics.com.au/tutorials/ws2812-addressable-leds-arduino-quickstart-guide.html
Core Electronics is your home in Australia for:
WS2812 RGB LEDs https://core-electronics.com.au/components/leds/addressable/ws2812-rgb-led-strips.html