I struggled to find a description of it on the web (everybody gets hung up on secondary details like 'light a candle' and 'read a sacred text') but basically you can (1) set a timer for some specific time (say 5-10 minutes to start, could be more once you get experienced; it's important to use the timer so you don't need to think about when to stop.) (2) meditate by closing eyes, focusing on the breath, relaxing, for…
What you are describing is "mindfulness" exercises; basically a modern take on meditation. I have the app "Meditation Studio" which consists of some softly-spoken people talking you through breathing exercises and relaxation - would recommend for anyone wanting to try these techniques.
... except I hate the word "mindfulness". There is a specific person I know who talks about "mindfulness" and then walks into an open pit.