is the camera on a tripod? this would help tremendously. at a shutter speed of 1/125 it is manageable to get good pics but with a tripod it is much easier. i am no expert but i would set the camera to AV mode and go to the farthest focal point possible, better DOF (depth of focus). from there adjust the aperture to the correct DOF that you would want it at, what is blurred and what is sharp, and shoot away. if you do not have a tripod increase the ISO.
hope that helps