 There's three areas which, when you explore, are instantly going to help you improve your photography skills as a beginner. Aperture, this is how much light the lens is letting through. Those are those odd numbers that you see on a lens, F1.8, F2.8, F4, 5.6 and so on. The wider aperture, so that's a smaller number, creates a shallow depth of field. And a narrow aperture, that's a larger f-stop, creates a wider depth of field. The shutter opens and closes to expose the sensor. The longer the shutter is open, the more light is hitting it. And that time that is open is usually measured in fractions of a second. The shorter the exposure time, the more that you are going to freeze motion. The longer that that shutter is open, the more blurry and abstract the image becomes. ISO number, the smaller the number, the less sensitive the higher, the more sensitive. Now, higher isn't always best. The more sensitive that you make the sensor, the more you're going to introduce the thing that's called noise. Just know if you want to have those smooth tones that so many people talk about, you want to choose a low ISO.