(I split these posts off a different thread into its own thread.)
Vickie, since you mentioned you're using the M mode, that would mean you're setting all the different exposure options manually. That's a lot of things to control, which is fine, but if you're really just getting started with these options, I'd suggest you begin by playing with the Tv and A controls.
In Tv you set the exposure time and the camera picks everything else. So your only decision is how fast the shutter will open.
In A mode you pick the aperture opening size and the camera figures the rest out for you. I spend most of my time in A mode because I like controlling the aperture more than anything else.
If I want to set spot metering, I'll turn my camera to A mode, set the aperture appropriately (often f/5.6 or f/7.1) and then change the metering mode.
You'll love the t3i once you start getting used to the controls.
