Reddit reviews WS2812B Digital RGB LED Strip 150 Pixels Individually Addressable 5V, Aclorol WS2812B Programmable 5050SMD 30 LEDs/m LED Strip Dream Color IP67 Waterproof

I don't see anything that confirms they have a male/female plug setup to link together. The listing doesn't say anything about it, and none of the answers do either. Def more "inconclusive" than "verifiably the case", tho.

You can usually DIY to link up RGB, but a ARGB splitter will be much more of the plug n play solution you're looking for. Since you only have one header, you could get something longer like this or this. I can't personally vouch for the quality of either of these products, though — just that they should be compatible with your setup and not require a splitter.

Yes - it does have a controller. But, I'd like to take that out of the picture. I want to strip each of the RGB cables and wire them into the controller/driver that I linked you. Then using the Enttec adapter, I can input dmx into the driver to control the two led strips. I'm not looking to control the individual LEDs on each strip separately, just want to control the LED strip as a whole. Put some gradients, strobes, etc. I was thinking of programming some stuff on QLC+ and going through it like that. I'm not sure how good of an idea it is though.

I'm not trying to host a house party yet, just trying to learn DMX as a hobby. :)

However, for what you're saying regarding the Neopixels, these seem pretty cool: https://www.amazon.com/Aclorol-Individually-Addressable-Programmable-Waterproof/dp/B07BH3NDWV

If there was an easier way to drive them though, and be able to "program" a show from the computer - that would be nice. Can I use presets in QLC+ to control those Neopixel strips? Or would that require the ethernet to arduino complications which you just referred to?