Besides all the good advice already given, heres a snapshot (ugh, bad pun) of what you need to know.1) Exposure: determined by ISO (sensitivity of the sensor to light), shutter speed, aperture. When starting out, set your ISO to the base ISO (in your case, 100), and leave it there (pg.79 of your manual). You may have to change it later, but thats another lesson.2) How to set your exposure? Thats the role of the cameras meter. But before you can use it, you should set the metering mode. For the time being, set it to Evaluative (see pg. 102 of the manual). Next, where do you find the meter? Look into your viewfinder, and compare it to the picture on pg.21 of your manual. In the middle along the bottom, youll find the exposure Level indicator. When something is properly exposed according to the camera, the needle should be on the zero (its actually like an upside down house icon, but its in the middle). You activate the meter when you partly depress the shutter button. Oh, one more thing you also need to set the mode by turning the Mode Dial (see pg 18). For the purpose of this exercise, set to Av (which stands for Aperture Value in Canon-speak, pg.96 in the manual). This means YOU tell the camera which aperture you want to use, and it will then set the appropriate shutter speed. So which aperture to use? For now, set it to 5.6 using the dial next to the shutter button. If you point the camera at something in a brightly lit room, the camera will probably select a shutter speed like 1/60 sec. How can you tell? Well, looking into the viewfinder, you will see two numbers to the left of the meter. The leftmost is the shutter speed, and the next one over is the aperture value. You should see 60 5.6. Those stand for 1/60 sec, f/5.6. Click the shutter. Camera takes a picture. Its properly exposed as far as the camera is concerned.3) Yes, but is your subject in focus? Your camera has an autofocus function, and a number of sensor points which it uses to determine the focus. But which sensor? And which AF mode? Again, lets keep it simple for starters. The most sensitive AF point in the camera is the center one. To set it, press the AF point selector button (see pg. 19 of your manual to locate the button on the upper right of the back of the camera body), and follow the directions on pg.85 to set the center AF point. So youve told the camera to use ONLY the center point for focusing. Next, go to pg. 83 of the manual, and follow the instructions to set the One Shot AF for Still Subjects. This means that when you aim your camera so that the center AF point is on your subject, the camera acquires focus using ONLY THAT POINT (the confirmation light will blink), and it then is ready to shoot. Oh, your lens also has an AF/M button somewhere make sure it is set to AF. So now, point your camera at your favorite subject in a brightly lit room, depress the shutter halfway, let the camera acquire the focus on the center AF point, press the shutter the rest of the way, and youve got another image. It should be properly exposed and the subject on which you pointed the center AF point should be in focus.4) OK. Youre ready to turn pro. Just wanted to thank you! Your advice has already gotten me leaps and bounds from where I was! I have found a new love for my camera. Just kidding. Theres lots more to learn. But at this point, use the links youve been given and start trying to put things into some sort of mental structure.Now, if this seems like too much work, then just put the camera into full auto mode (thats the green rectangle on the mode button on top), and the camera will do all the work. You are guaranteed to have something in focus, and something in the frame will be properly exposed. It may not be YOUR chosen subject, but then with that mode, youve given the camera full control, and you get what it gives you. If you dont like that, then youll have to take control, and thats what all the buttons and options and menus are for.