For a more dynamic composition, don’t center your subject. Put them on the extreme left or right:
Off balance is more dynamic
Balanced compositions are a bit boring. Off balance as more fun and interesting!
Also note Cindy in the far left, also looking out of the frame to the top-left:
What is the point of composition?
Composition: to highlight beauty, to heighten beauty, and to add force to your images.
Composition and physics
Many of my best breakthroughs in studying composition is in studying nature, physics, mechanics. Or even studying mathematics:
Asking for permission
Ask your subject for permission, then place them at the extreme left or right of the frame: