Photos on my Nikon d3200 camera are blurred?

I have had my camera since Christmas and I'm photographing horses going over jumps and stuff like that. I have my camera in sports mode on the continuous setting and the photos are never clear. I have changed the shutter speed but they still come out blurry, any help. Also I'm only 14 so I don't really understand a lot of the technical camera words.

It needs a fast shutter speed.
A good zoom lens.
The MAIN reason why its blurry is focus.
What are you focusing on when you take the picture?
Is it in manual or automatic focus?

For clarity, the statement "The MAIN reason why its blurry is focus" is a misunderstanding.

Out of focus is out of focus.

Blur is a whole different thing, caused by either camera or subject movement (or both) caused when using shutter speeds that are too low to overcome camera movement or subject movement.

Make sure that you keep your shutter speed at 1/500th second or shorter. If you are using a long telephoto lens, the shutter speed might have to be faster than 1/1000th second

NOTE: Your age has NOTHING to do with not being able to understand the necessity of balancing ISO, shutter speed and lens aperture to assure well exposed images. I know people who are over 45 years old who seem to have the same problem you do, blurred images caused by using shutter speeds that are too long to prevent camera movement from causing blur or to stop the action of subjects like horses, cars or other fast moving objects

Here is a link to help you understand how ISO, shutter speed and lens apertures control the exposure of film or a cameras sensor

Age has nothing to do with understanding technical words.

Kids half your age have Extra-class amateur radio licenses,
which requires knowing, among other things,
the meanings of lots of technical terms.

So, start learning photographic terminology
and how to apply what you know to taking pictures.

As for the focus problem:
Learn more about how to use the camera.

>>> If you are trying to follow the movement of the horse, stop doing that.
Hold the camera still and press the shutter button at the right moment
when the animal comes into the frame.

My son was 9 when I gave him his dSLR camera. He didn't know any of those technical words too but he did get by following just one rule. Shoot under lots of light only.

Sport mode should set the shutter speed to a fast enough speed to stop motion, especially when outdoors in the day.

Maybe you have not set the lens to Autofocus. On the lens make sure the sliding switch is set to A or M/A.

Another possibility is the AF-Area Mode. I always use Single-point AF, even for moving subjects like jumping horses.

Finally, there's the photographer. Are you pushing the shutter button down half way to allow the camera to focus? And then pushing it the rest of the way down? Really must do that.