You meditate for anywhere from 5 to 10 minutes every day. You can start with even less. Maybe try it for 1 minute in the morning. And when you can sit still and relax for that long, move to 2 minutes. And then you keep increasing your time as you get comfortable with the practice.
The most important thing is to just start. The next most important thing is to be consistent. You are trying to set a new groove here. So starting simple is a great way to go.