I have a friend who is a ticketed carpenter. He found the construction industry boring, corrupt and decided to change careers into computers. My first training session went well, but there was only so much I could teach him in the time alotted.
We both came to the realization that he needed formal edication for both learning the concepts and gaining credibility. He just finished his first semester and is loving it!
Instead of being the teacher, point your friends to people that are trained to educate. If the person is serious about changing their life, school is the first place they should go.