When we describe how to do a crunch, the hands can be behind or beside the neck or crossed over the chest.
For beginners, I recommend place them on the thighs. Obviously, lie on your back with bent knees 🙂
Exhale and contract your abdominal muscles, approaching your breastbone to your pelvis.
Reach your knees with your fingers. Inhale and come back to starting position.
Is it easy enough?