A lot depends on your national CAA. Some medical forms only ask about conditions treated by a medical practitioner. Others may include non-medical practitioners such as psychologists.
There are many kinds of psychotherapies. Your CAA may be apprehensive of some while unconcerned, even completely ignorant, about others.
A history of anti anxiety medication prescribed by a psychiatrist will be concerning to most CAAs while several years of membership in a Toastmasters Club won't be. The underlying condition may be the same.
We all encounter stress and anxiety. Younger people entering adulthood are often in a stressful period.
Have a careful look at your national medical standards and forms. Choose your therapy accordingly.