A little help goes a long way when shooting photography. The cheat sheet above helps you with Aperture, Shutter Speed, and ISO.
Aperture and Depth of Field :
At f/1.8 aperture means you are going to have a shallow depth of field, and most of your capture will be fuzzy. Lens: Canon 50mm f/1.8 STM
An aperture of f/11 the foreground has detail in the image whereas the distant background become less in focus. The shutter speed was 0.6 seconds to create silky water. Lens: Canon 17-55 mm f/2.8 IS USM