They were all done without a tripod unfortunately

I have the originals in bigger sizes I can post. I'm looking for ways to improve the pictures I take. What do you mean by metering issues? Whats a good size to post pictures on here? I usually shrink my down from the original size.
Well it's really hard to tell from the black and white small photos above, but it looks like the camera may have been set so it's adjusting for the light in one area of the photograph when really the point of interest (such as the little boy standing at the plate) is in another area, which causes him to be underexposed. It is really difficult to tell though with the pics posted, hopefully we can give you better feedback with some larger, less edited (as in preferably still color at least to start with) examples.