How can I take a picture of my Christmas tree with LED lights ?

If you're shooting towards the end of the day or when it's already dark, set your camera's ISO higher so that you can keep a fast enough shutter speed.   If interested, see the tips in the link: https://www.ninamacephotography.com/top-tips-for-p...

You can turn off the lights and then take a picture. 

have you thought without a flash in night mode ..

If the lights are blurry but the rest of the picture is ok it's not camera shake - that would cause everything to be blurry.  My guess would be that the camera's trying to get the right overall exposure, and the lights are over exposed / burned out as a result.  You could try using a fireworks setting if your camera has one, or switch on some more room lights.  I doubt that you'll be able to get the "Christmas card effect" without using a more sophisticated camera and an image editor.

The lights are blurry because the camera moved during the exposure.  The shutter speed used was too long for you to hand hold the camera.  The solution is simple: Place the camera on a steady surface or use a tripod.  Next, set the camera to self timer and press the shutter button.

Your camera has the ability to make an exposure as long as 15 seconds.  It is possible to have the light low enough to require an even longer exposure time.  I would start off at the lowest ISO and see what happens.  If the ISO was too low, only then would I increase the ISO to 200 and retry.

You could also increase the camera's ISO, but at the expense of much lower image quality.  Instead, use the above method with the ISO set to the lowest number for the best results.

The camera is getting too much movement from your hand when you take it.  Mount the camera to a tripod, or put it on a stationary object and use the camera timer to take the picture.   You can also increase the lighting in the room which should help.