I wonder if it's possible to do it without any teaching experience?
If you have been working with others as a Web developer, you will have acquired coaching skills and the ability to explain technical information.
I would suggest that you start with small groups of people (4 to 6) in a local coffee bar gain experience as to the things they find difficult by using materials easily available in the appropriate language.
A couple of workshops will give you an idea of what you need to focus on.
Basically, start and iterate. I hope the OP posts their materials as I think this is a nice idea to start in other cities.