To the OP. You may not want to hear but there is a simple formula for taking sports shots, especially indoors. It is simple. Fast glass, Fast glass, Fast Glass, plus a good understanding of the body you are using and the trade offs you are going to have to accept to get photos from indoors events.
Fast glass is not cheap, but is allows you to get the required shutter speed of at least 1/250th a second to begin to freeze motion. 1/320th to 1/500th would be better. To do this you need to shoot pretty close to if not wide open with fast glass. To do this it is going to cost money. I shoot sports and I easily have $25,000 + tied up in bodies and lenses. Mostly in lenses.
For shooting you own kid you don't need to spend that much, but you will need to get away from that whole "one lens to do it all" idea. This is photography not some J.R.R. Tolkien novel about the one ring and middle earth.
For volleyball you would be best served with something in the 50mm to 85mm f1.8 range that is sharp and had a fast focus motor. You might get away with a 35mm lens if the conditions are right. I shoot Canon so I can't speak to the better Nikon lenses in that range. The other alternative is a 70-200 f2.8. For my tastes f2.8 is a little slow for school gyms be it Jr. High or High School. Most are dark dungeons. I will use a 200 mm f2 for indoor basketball and such with Division 1 colleges on a second body, but I am generally shooting shorter glass from the end I want to capture the action.
If you can get something in that 50 to 85mm range get down on the floor court side or sit on the floor in front of the bottom bleacher. Shot low and anticipate your shots. For greater detail on shooting indoor sports try the search function. There are several threads that have detailed explanations for shooting both indoors and out.