The pictures below are just showing a prototype. You can also directly connect the WS28xx data line to SPI1_MOSI pin 19.
But please read https://learn.adafruit.com/adafruit-neopixel-uberguide/best-practices
There are 2 versions for the prototype board:
P4 - DIL https://github.com/vanvught/h3dmx512-zip/tree/master/eagle/Orange-Pi-Zero/Pixel/P4
P5 - SMD https://github.com/vanvught/h3dmx512-zip/tree/master/eagle/Orange-Pi-Zero/Pixel/P5
Included are BOM and CPL files.