Begin by hanging from the bar in a hollow position. Scapula depressed, PPT, Core engaged, leg together (Shoulders down, tailbone tucked, arms straight)
Engage your whole body, keep your arms straight, utilise your lats to explosively pull yourself into a horizontal position., as in front lever. Try to control the negative as you return to your hanging position.
Maintain straight arms and a hollow position throughout. As you progress limit the amount of momentum used.