As was suggested early in this thread you need to use a flash in this circumstance. That will enable you to shoot at a fast enough shutter speed to prevent problems with subject movement and employ a reasonably small aperture to give you sharp results. Best results are obtained if you soften the light, for example by using a diffuser over the flash head or by bouncing the light off a white surface. You will need to experiment a bit to get it right. I use old flash guns picked up second hand (but check the voltage over the terminals as it fires as some will fry your camera). Put the camera in manual mode and select say f5.6 and 1/100th as a starting point. Alter the aperture, subject distance and, if necessary, the ISO setting, until you get it right. You will be lucky to get good results straight away, but after a bit of practice you will learn what set up gives perfect exposure every time.