Our kids are both much taller than I am now and they have just turned 14. Probably because my husband is over 6'5". They are both playing volleyball now and we've put more effort into volleyball than we have ever put into a sport before. We are doing it because the competition to play at our high school is tremendous.
They are taking semi-private volleyball lessons. The coach broke down hitting-the-kill shot into easy steps for them. For example, first he taught them how to do the legs and had them practice for a week, then the arms, and again they practiced for a week. Next he worked on their timing by putting it together, and then explosiveness for several weeks. It really worked, they both became much stronger "kill-shot" hitters.
Now their coach is moving on to teach them other skills like making a good platform for passing since they have both been playing "middle blocker" and blocking continuously at the net, so they haven't had a lot of experience with passing. He taught them to run through a pass instead of stopping to hit, unless you can be stopped for a full second before you have to hit. Finding out what you should be doing is the first step, then doing it over and over is the next step to win.