Let me give you a hint because I answered this question (how to install from the AUR, not in general) a few days ago:
https://forum.garudalinux.org/t/how-does-the-aur-work-is-the-aur-website-not-the-same-as-the-normal-aur/16667/2
Anyway, please take some time to search and familiarize on how to install in an arch-based system.
As regards the package you need, if the one suggested above should not work, you can also try g810-led-git, again in the AUR.