Don't make it complicated. There are 1001 resources and all of them work. The trick is finding one that the person like and helping them to develop the habit of mindfulness. I am betting that there are several groups in your area. There are also great self-help books. A favorite of mine is Mindfulness: An Eight Week Plan for Finding Peace in a Frantic World by Penman.
There are also great apps. I like the Insight Timer (available for both ios and android).
And there are an endless array of online resources like: https://www.mindful.org/medita...ess-getting-started/
The big challenge is doing it regular over a long enough time period. It is like the gym. You build muscle by doing it, not studying it.
Tony