I don't really have a resource for you, but rather some insight.
You do have the right idea to get proper training on kettle bells.
I bought some very good vids, and various kettle bell weights and took the "do it your self" approach.
It went fine for many months, but I later ended up hurting my shoulder.
If I had to do it all again, I'd get training on proper form before starting.
It's an intense form of exercise.
I loved it - Cardio and weight training wrapped in 1 great workout.
I'll check back here to see if anyone has suggestions.
Good luck to you.