Let me show you. Look, at first place both sticks between the thumb and the fore finger, then, keep one still and move the other, so as to make them work like pincers.
So, the blade faces up, perfect, so you're holding with your thumb, your index is out, wrap and twist, and then, keeping the prongs down, they go into your mouth.
Instead, after pinching the teacup handle with your forefinger and thumb, the remaining fingers are either used to neatly steady the bottom of the teacup or otherwise tucked into the palm of your hand.