Member Sean has done an extensive amount of work for his Christmas lights project mostly based on addressable WLED leds and Seed Pixels.
Mini Tree kit
Build instructions
https://www.thestockpot.net/videos/mini-tree
PCBs
https://www.thestockpot.net/store/p/mini-tree-pcb
Mini Tree Printed supports
https://www.thestockpot.net/store/p/mini-mega-tree-printed-components
WLED controller
DOMRAEM ESP32 WLED Addressable 2CH LED Controller
https://www.aliexpress.com/item/1005009735039289.html
Additional tools & materials used
Centre supports
https://www.bunnings.com.au/garden-rain-15-x-600mm-poly-rural-irrigation-riser_p3111371
2.5cm pitch WS2811 Seed Pixels with Black wire
https://www.aliexpress.com/item/1005007501040858.html
3 core 50cm xConnect M & F pigtails
https://www.aliexpress.com/item/1005006491112458.html
Brush-On Electrical Tape Black 118mL
https://www.altronics.com.au/p/t3135-black-brush-on-electrical-tape-118ml/
Solder pot
https://www.aliexpress.com/item/1005011871766390.html
Soldering iron, Wire strippers, Side cutters, Solder wick & Flux
WLED Firmware
https://kno.wled.ge/
Some videos of the Leaping Arches and the Stars (for the tree).