:( I know what that feels like. I see that there are numerous helpful responses already. Here's a couple links:
1) How to ADHD (https://www.youtube.com/channel/UC-nPM1_kSZf91ZGkcgy_95Q/vid...)
2) Lecture by Dr. Barkley. Essential Ideas for Parents: https://www.youtube.com/watch?v=SCAGc-rkIfo Type "Dr. Barkley ADHD" to see shorter snippets.