You know how to breathe.
Do the pose. Remember to breathe.
Do the pose. Align, engage, extend, and allow your breath to follow.
We all differ. You will learn to feel the breath that works for you.
This takes time. It becomes quiet and unobtrusive.
Trust that with practice your breath will follow.
Learn the pose. Practise the pose. As the pose becomes familiar, your awareness expands. You will notice your breath. And slowly, your breath will become part of the pose.