The overall goal of this study is to learn how to best support teens with CHD to improve their health and quality of life. Adolescents with moderately and severely complex CHD experience considerable risk of mental health comorbidities. Psychological health is important to cardiovascular health and related outcomes. This study will evaluate the effectiveness of a well-being focused telemedicine intervention in adolescents with CHD. The study is to learn if the WE BEAT program helps teens with CHD improve their ability to cope with stress and anxiety. The study will also create a data bank to study connections between mental health, heart health and biomarkers (hair, saliva, urine, blood samples).