I have yet to try any good night shots, but from my research and playing around in the living room it is fairly simple.
1) Use a tripod as sturdy as you are willing to carry to ensure it doesn't move. Getting one with a hook on the bottom to hang a heavy bag can help as any movement will result in blurriness.
2) Set the Aperture (F-Stop) as high as you can, however if you want to blur the background lowering this will accomplish it.
3) Set the ISO as low as you can, but if you don't want light streak, this is going to be where you can add graininess in order to lessen shutter speed.
4) Set shutter speed according to the amount of light available. I will usually take a picture, review it and adjust. It is easier to bring up in post than to bring down IMO so try to get it as close is possible, but if it's a little on the dark side that's okay.
5) Set it to manual focus and try to get what you want in focus. Auto focus in low light can really bite you. If you have to shine a flashlight on what you are trying to get in focus.
6) Set the camera to timer mode so that there isn't any shaking in the camera from your finger. You can also skip this step by using your phone as a remote.
Here was a video I used to learn from:
Aperture, Shutter Speed, ISO, & Light Explained-Understanding Exposure & Camera Settings - YouTube