Not sure if I can sum up for you:
ISO: 100/200/400/800..... The higher the numbers, the grainy it will be.
Aperture: F1.8/F2.0/F2.4/F.2.8..... The amount of light that enters through your lens
Shutter Speed: 1, 1/10, 1/50, 1/100..... The length of time your shutter is open when taking a photograph.
Your safest bet of shooting with your camera consistently good is to set to Aperture Priority, your camera will adjust your shutter speed and ISO for you. DO NOT SET AUTO, you will learn shits and sometimes it is not reliable.
Some circumstance you will face:
Shooting at Day time
• Aperture f1.8 for "bokeh" effects (shooting objects) or f4.0 and above for shooting group picture or a scenery. If you set to Aperture Priority, ISO is normally between 100-400, meaning your picture won't be so grainy.
• For freezing shots, adjust your shutter speed to 400/800, ISO might go up to 400
(seldom take these kind of crap pictures, so I'm not too sure)
Shooting at Night time
• Shooting object or a person, set it to ISO400, maxed ISO800 with aperture F1.8, you need a steady hand.
• Shooting a scenery, if you want fine pictures, not grainy, use a tripod, set ISO100, you might need to adjust your exposure compensation too. If you dun have tripod, can use your hand, but set your ISO higher, it will be grainy, detailed is impossible.
• Freeze shot at night? quite impossible with your camera, even with flash, dun try, hahaha.....
Shooting Indoor
• Your safest setting is ISO400 with F2.8 on generic shots, and a steady hand, no tripod or flash needed.
My last advice: If you in a rush, dun bother to shoot, take your time and find a good angle, you have a good camera which can shoot some ridiculous angles, utilise it to its max. Good luck.