Could use a "tl;dr guide" of sorts on how to use Android.

In other words... a "Use this to do that" guide. Or more specifically, how to customize it (Get rid of the wallpaper, use lower resolutions, set up apps to run on boot, permanently change scaling_min_freq, etc without the usage of third party apps) and where to find a decent/optimized version of it (Something like LineageOS? That works for armv7 32 bits?).

t. I'm currently using an Orangepi zero 3 sbc (which has zero gpu support on Linux afaik). And I'm forced to run Android on it because of it.

Thanks in advance.