From Adho Mukha Svanasana, ground your left foot at a 45 degree angle. Inhale, step your right foot between your hands, check for front heel to back arch alignment, exhale here.
Inhale, press into your feet to come up, open your hips to the side of the mat, front knee bent. Exhale hinge to your right from your hip joint. Place your right elbow on your right thigh, or place your right hand on a brick, or to the ground inside/outside your right foot.
Extend your left arm up, rotate your arm, palm facing the front of your mat, reach your arm over your ear.
Bottom waist rolls forward, top waist rolls back, gaze under your upper arm.