It is really hard to explain to people who don't have any idea what bitcoin is. My takes a lot of time to explain me from the beginning ang how it works. For me I think the best way to start is aak then if they want to have an extra income  woth investing, the start to explain then how to begin and how it will work. It is better if you can explain them personally , in my experience it waa through chatting, it's hard but iam into technology so it a bit easier for me to so what my cousin ask me to do or t o follow his intructions to me. Just be patience they will learn.