I know that while learning how to use your camera, it can take a while for everything to sink in. (Does a bigger number let in more light? No?! I’m just going to use auto-mode instead..)
Figuring all this out and employing it to take better pictures is a process.. and to help with that I found this easy to understand cheat sheet (via Miguel Yatco)
So keep this with your camera and pull it out when all that f-stop, ISO, Depth of Field, Shutter Speed data starts to get jumbled in your brain. Stick with it and I can promise that it will become second nature.