Or go outside, set to aperature priority(f8 or so) turn on the flash and practice by looking at the shadows with and without flash.
Color temp will change the way things look to us. Incandescent bulbs will make things have a yellow/orange cast
Flourescent (f40cw) tubes have a bluish tint. And then there is the sun..the best light source
This picture was taken using these tips notice the shadows and all details are evenly lit!! simple camera, operator, and setup.....just lotsa practice!!