This is a huge space to get into. I’m on my fourth year doing an outdoor light show.
My personal preference is 12v ws2811 bullet-style voltage-regulated nodes. They’re extendable, individual nodes on a strand are replaceable if you’re willing to do some cutting and crimping.
I like the 12v because you can go for longer strands without losing colors from voltage drop. Regulated over a resistive voltage divider = less heat.
As has been mentioned, you can install WLED onto a microcontroller and have a web-page for a remote control.
I know programming but only very rudimentary hardware, how difficult is this to do? Are there guides?
I'm sure you know but for others reading, 12v ws2811 are grouped in threes, so not individually addressable. 5v is, and when you're working at scale power injection isn't a huge deal as you'll be doing it anyway.
Always standardise your connectors. I'm a fan of the Ray Wu ones.
ESP/WLED driven is my preference, but the Falcon controllers are popular amongst people who are more DIY/woodworking oriented as they're much simpler to set up and not _heaps_ more expensive. Falcon Player/xlights is the standard software for designing/playback of your show regardless of hardware.
Coro props (corrugated plastic, corflute) are a cheap and effective way to stand out from the crowd. Animatronics, smoke etc are also an option when going more advanced.
It's a lot of work. You rarely want to start after October or order your goods after July. You are running a live production and things will go wrong. Good luck to anyone entering the space, it's very fun and expensive!