The simplest method when you don't have any additional supplies like a cloner bucket, cloning gel/powders, rock wool or root cubes right now is to just put the cutting in a glass of Ph'd water. Use a dark glass, some people even cover the top of it with something so the light doesn't penetrate the water.
Put it in a windowsill or somewhere that has light and just keep an eye on the water level until it roots.
This can take a little longer, but until you can afford quicker methods...it works. I've done it many many times.
You will read lots of different methods of cloning. I'm just giving you a very "grandma's window rooting" method.