Cubitus valgus means that your arm is outwardly deviated. As you must have read the normal carrying angle is about 11°. The only way to reduce the carrying angle is to undergo a surgery at this age. The most common cause of this deformity is unattended fractures in childhood. Normally if there is no other complaint to the patient it is left as such because elbow joint is a non-weightbearing joint.
Next Steps
Xrays of bilateral elbow needed.
Health Tips
My opinion is to opt for another low demand profession as undergoing surgery for just cosmetic reasons is not recommended at all.