Art of Strength, based on the East Coast, is very generous with training tips on kettlebell form. They have some great videos and from time to time, I will post them here. I am fortunate to train with some great people from their organization, Christine Huppee and Henry Marshall, of Punch Gym.
The first is a foundation movement, the swing. Before you can learn any other kettlebell move, you must master the swing. It is a bend pattern that incorporates gluteal and hamstring muscle as prime movers and requires a neutral spine and activated lower abdominals for optimum results. Sounds complicated, but really it is about using your butt and legs to create momentum to lift the bell. It is also about keeping your center of gravity back in the heels to protect the lower back from carrying the load.