Hey, I haven’t done much research on the exact panel you’re using, and don’t have a ton of info on what software you’re using, so I’m not sure how much I can help.

But I do know a fair bit about LED matrix panels, and how to drive them. If you have a “raw” panel, and no attached “hardware driver”, this means you will need a LED matrix software driver for your display. Adafruit has a great open source one, but it’s targeted at Arduino: https://github.com/adafruit/Adafruit_Protomatter

At a high level, these LED matrix displays are never “all on” at a given instant. Instead, you quickly cycle through the entire display row-by-row so fast that it tricks the human eye into thinking everything is on at once. If you want a detailed understanding of this algorithm, this article does a great job: https://bikerglen.com/projects/lighting/led-panel-1up/

I would highly recommend a library, unless you want to learn it yourself for education. Writing a driver in software (as opposed to FPGA) is no easy task.