1/72 scale figures within a diorama

7th-hussar, ANY movement of the camera at the moment the shutter is moving will be translated into blurry pictures. To minimize that, you can do several things:

• Buy a tripod. Small ones are inexpensive, and they give the camera a stable platform to sit on. Just make sure everything looks level through the viewfinder before you snap the picture.
• A cable release or the camera's self timer. Either will greatly reduce camera movement, because you aren't touching the camera when the shutter clicks. Almost all cameras have a self timer, but in my experience they are awkward to use for the close-in work you're talking about. A cable release doesn't cost much, is easy to use, and will give you a little more flexibility in positioning the camera and lining up shots.

If it's not an SLR, there's not a lot you can do. You might be able to find a magnifying attachment for the lens, but that's it. Try dropping back a bit and using the telephoto function. That may get you a better image.

If it's an SLR (interchangeble lenses) you have three options. Best and most costly is to buy  lens with a macro feature on it. Next would be extension tubes that mount between your lens and the camera. Lastly would be a magnifying lens that mounts like a filter.