Diagnosed with ADHD at age 8, able to make it through school but struggling at work. Fired last Tuesday. My plan now is better treatment, mindset, and work envi

Diagnosed with ADHD at age 8, able to make it through school but struggling at work. Fired last Tuesday. My plan now is better treatment, mindset, and work environment. One problem is stimulants mess with my heart. Does anyone have any advice? Does modafinil work? Would appreciate some advice from people in tech with this problem, thank you.