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First graphic, incl. Koala dude.
That one talks about all kinds of things.
It's more suitable to people who don't need many pictures to understand the whole deal, but it also gives you a few terms to google and further look into.
The triangle at the top is important, the three most important settings on your camera to determine the look of the picture are shutter speed, aperture and ISO.
Combine that with the white balance and you have all settings you basically need to know how to use and change in your camera.