New to anything like this. May I ask a few questions?

[MichaelAndroidNewb]

I barely understand what this means, however I have discovered that by going through tutorials, that one could do things like improve sd card performance, improve battery life, and many other things. Of course this interests me, but as I said I am new to android and I barely understand what this really means. I have hacked a lot of gaming consoles in the past and jailbroken many iphones, but that is about it. Definitely very new to all of this.

My device is the UMIDIGI A3X. Would it be possible to flash stock Android 10 onto this device (once I learn how to do this safely, still have to learn this) and then simply follow tutorials on kernel tweaks for the desired changes I want, without really truly understanding this kind of programming on a real level? In another words just going through the steps for the desired performance changes I seek.

Or am I way out of my depth here?

 

[jwoegerbauer]

IMO SD-card performance basically has nothing to do with Android OS itself - but of course you can change relevant Android's cache size setting what probably doesn't result in any measureable results. Also you've to distinguish SD-card's IO read / write speed what depends on both the type of data bus the Android device supports and the SD-card's speed-class ( 2 - 10 ).
And battery life doesn't depend on Android OS: it solely depends on how the device - read: its CPU/GPU - is used/stressed and - most important - whether battery is always correctly charged ( never less than 30%, never more than 80% ).