I am going to bet that your problem is low light. Indoors, you often have very little light -- less than you think, at least, and much less than outdoors. If you're holding your camera (not on a tripod), then you probably are seeing blur resulting from your camera shaking.
Solutions are various... I don't know what settings your camera has, but the general solution you want is a faster shutter speed (long shutter speeds mean that there's more time for your hand shake to blur the photo). If you can choose your aperture or ISO, try making the aperture larger (smaller f/number), or turn the ISO up.
If that's not an option, then other solutions include: create more light (lamps, windows, overhead lights, whatever you have). Also, use a tripod to avoid shake. Those are general ideas -- specifics upon request.
