For night photography you may need a long exposure, so you will need a tripod or solid surface.
It can be carried about with you all the time, unlike a full height tripod that can easily be left at home or in the car.
Just place the tripod on a wall.
On the ground for a interesting pov (most pictures are taken at eye level).
But remember to switch off the IS.
You can visit the pound shop for a tripod, but I like to splash the cash spend nearly twice as much and get one without the ball and socket which works with a DSLR.
Set the timer for a 2 second delay.