The swing is a powerful hip hinge, not a squat that lifts a bell with the arms. The glutes snap the hips forward. The arms are along for the ride.

Diagrams show the shape of the movement. Follow the written steps before you add load.
Equipment. Kettlebell
Muscles. gluteus maximus, hamstrings. Also core, erectors, quadriceps
All Cheeked Up publishes general fitness education. It is not medical advice, physical therapy, or a promise that your body will change. Stop any exercise that causes pain and talk with a qualified professional about injuries, pregnancy, or health conditions before you train.