As a really vague/generalized rule of thumb the shutter speed should be something like:
1 / focal length
So if you’re shooting at 200 mm you should use a shutter speed of 200 or faster to avoid camera shake.
In a photograph like this at a very slow shutter speed and handheld it’s almost impossible to hold it steady and avoid camera shake.
So if you need to shoot a slow shutter speed photograph of something like this use a tripod. That will make everything that isn’t moving nice and sharp and the things that are moving will have that nice motion effect.
That said you’ve done well here.
Keep practicing!
😉