Exposure for Outdoor Photography by Michael Frye
https://www.michaelfrye.com/2012/02/16/understanding-exposure-outdoor-photography/
In photography, creativity and technical skill are both essential. It’s great to have a wonderful eye and imagination, but no one will appreciate your genius if your images are washed out and blurry.
The most essential technical skill a photographer must master is exposure. On the surface, exposure seems easy. It’s simply a matter of making the image bright enough—not too dark, and not too light. But the endless variety of light makes exposure challenging. No two situations are the same, so there can be no exact formula for getting the right exposure. On the other hand, exposure doesn’t need to be overly complicated. The fundamental controls—shutter speed, aperture, ISO, light meters—are easy to understand.