I recently started on my photography journey and is just starting with darktable. My biggest challenge is around multiple modules with apparently very similar f

I recently started on my photography journey and is just starting with darktable. My biggest challenge is around multiple modules with apparently very similar functionality. It has been very hard to figure out what should I do to get to the end goal I have in mind. FWIW, most of my work is in underwater photography and what I really want is adjust exposure, white balance and change the de-saturate aqua and blue in masked areas and I got struck with filmic, RGB and a couple of others, with none being easy for a beginner.