Yes, flexibility of body and physical perfection for Yogasana is important. However more important is the state of your mind, Meditative mind. Your flexibility might be excellent but if your mind is not attentive, you are merely doing some physical exercise, not Yoga.

Breath is the king of mind.

It is never too late in life to practice yoga

Do not think of yourself as a small, compressed, suffering thing. Think of yourself as graceful and expanding, no matter how unlikely it may seem at the time.

Practice doing yoga with an innocent mind. Then, you will be able to cognize the things happening in your body

A good teacher helps you explore the maximum.

Training of the mind and body leads to awareness of the soul