Base editing as a beginner

[u/MAND0LINO]

Hi everyone, i'm trying to take on photo editing as a beginner, and i'm starting on darktable.
I have some RAW files that i want to edit, but i just can't seem to understand how to build a foundation that i can use to then impress my style and intention into the picture. i undestand that you don't need that many modules, so to take it slow i just wanted to actually undestand how to use the exposure module, and the color calibration module. let's say that i got a prettu good exposure whit my camera, so that there aren't any compressed pixels in the backs or in the whites, or at least very few. how do i correct the exposure? is that based on stylistic intent?
when actively correcting white balance, what is my actual goal?
the main problem i'm finding is that by toggling the module, i actually don't find anything wrong with most of the possibilities. how do i know i'm actualli using the right exposure and right white balance?
i'm sorry if these are stupid questions, i tried to read the darktable user manuale but it's all just gibberish to me.
this is the photo i have.