Like a medical waiver with the FAA. Childhood history of ADHD (I always thought I was misdiagnosed). About a year and a half ago before I finished my bachelor's, I thought it would be a good idea to get enrolled in private flight lessons. After starting my instructor advised I get started with the medical side before getting heavily invested (great advice too). Anyway to get my waiver I had to go through a fairly long (and expensive) psych eval, it took nearly 9 months for the FAA to approve the waiver. NAMI was a bit quicker processing it in like 5 months. As far as I was concerned for completing my application, getting medically cleared would be one of the first and most important steps. It was a long and stressful process, especially at first but it was vindicating and I was glad I did it the right way.