Here are quick instructions for making espresso in an espresso machine:
Preheat the machine: Turn it on and wait for it to warm up.
Grind the coffee: Use fresh beans and grind them finely.
Fill the portafilter: Place the ground coffee and press it with a tamper.
Extract the espresso: Place the portafilter in the machine, put a cup underneath and start the extraction (25-30 seconds).
Enjoy: Serve and enjoy your espresso.