Install proton-up flatpak, install steam,lutris/heroic, whatever you want to use for the other stores. That has worked for me on any distro.
Try open-RGB for RGB control.
Your hardware isn’t bleeding edge, so older packages aren’t really that much of an issue unless you suffer from FOMO or just have to have that 1.1.2 feature, which case I found Flatpak delivers a fair amount of up-to-date apps.
The LCD display might need a Windows VM just to jump into when you want to manage that or look into opencorsairlink: github.com/audiohacked/OpenCorsairLink