Very simple. Go to shutter priority mode (S or Sv) and move the shutter speed faster ( bigger numbers). Shooting people, usually 150-200 is good. Doing fast sports movements (like throwing, betting), you may want to move up to 500 or more. It all depends on the situation. In general, don't go below 100 when shooting people. And for dancing, catching that breathtaking sharp mid-air pose may require 320 or 500 as well. Get a feel for what works and what doesn't in different situations.
the thing is, increasing this shutter speed will make your photos darker, or you may need more light. If you're getting blurry photos in Auto, then it's probably because your camera thought that there wasn't enough light, so it slowed the shutter speed to brighten the picture - but that also makes blur.
If your photos come out dark in shutter mode, then you may not have enough light in the scene. A flash (external is best) or high ISO, wide aperture will help you get more light in your lens. If you have no idea what those things are, then read up or find a brighter scene. Usually when I'm outside during the day, I can get up to 1000 and still have a nice bright shot. Indoors or at night are different. When there's not as much light, you may not be able to get enough in your lens to make a bright picture (when your camera only has 1/100th of a second to gather up light)
I hope that makes sense. Dancing (like ballet0 can be hard to shoot because the hall is often dark. Sports outside during the day, you should be okay. :0