This little guide to understand the basics of photography I found : r/coolguides
Camera Exposure: Aperture, ISO & Shutter Speed
What is the relationship between aperture, shutter speed, and ISO?
F-Stop Chart Infographic / Cheat Sheet
Exposure Values Give You a Better Understanding of How Your Camera Works
A chart of f/stop and shutter speed combinations matched to exposure values
Exposure Stops in Photography - A Beginner's Guide
Choosing a Shooting Mode
Exposure control
What is 'exposure value' in photography? - Quora