Since that casio is a point and shoot, you have some limits. I would highly recommend a tripod if possible, or prop the camera where it can't shake. Learn the controls, aperture, shutter, and manual. To get most of the subject in focus you need a small aperture like f22 or so. With shutter, the faster you set it, the less shake you get. I like shooting in manual because i can select the aperture and shutter to suit my needs. With a small aperture like that, you will need alot of light. Either ambient or flash. You will most likely have to experiment with the settings until you get the right combo/ratio.
While that is a 7.2megapixel camera, you can zoom in to a certain extent. Keep in mind though that that will degrade the picture. And of course that's only possible if the image is sharp to begin with.
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