The Chariot is the vehicle of The Hero and a symbol of the outward journey toward "individuation,", the personal growth.The Heroin accepts the challenges of life, helping her in integrating self. The journey harmonizes the spiritual(will, imagination, motivation, intuition) and physical(daring, courage, strength).
Steady hands master the vehicle to keep the stable and harmonized middle line. The achieved balance is also shown in the clear selections of colors. The sky riding Heroin wears golden yellow which symbolizes sun and the strong energy of life, vitality and strength. The white of the vehicle symbolizes light, purity and perfection.
Decisive expression of the face also shows both, the motivation for the mission as well as that the mission is accomplished.
For Pythagoras , number 7 is associated with victory, fate, destiny and transformation
You achieved all described aspects in your interpretation. :)
As always, great music for deepening the thoughts.