Positive Psychology

Has anyone ever tried teaching Positive Psychology skills to an ADHD adult, particularly to mitigate the Rejection Sensitivity Dysphoria? Given how the ADHD brain works how long does it take for new habits to form? Does it pay to try and share critical thinking skills or cognitive behavior changes? Even if the ADHD person is willing, does their brain have the capacity?  Thank you for those who have gone before me and can share their results. God bless you for trying.