Your engaging story simplified this complex neurotransmitter and made it digestible. Your points resonated with me well as I intensely investigated the role of this biochemical which is comprehensive as you pointed out. Recently I wrote about my research into its dysregulation which is also related to the mental health aspects that you described well. For those interested in details I link the story here as a reference to yours.

https://medium.com/illumination/dysregulation-of-dopamine-in-the-brain-indicates-multiple-neurological-mental-health-conditions-fc8b7da12cb4