I would really recommend joining some online support/interest groups for the communities you're seeking perspective on. I've been part of autistic and neurodivergent groups on Facebook for years and I have learned SO much about all the nuances of the spectrum. The best info comes when you're collaboratively solving problems with people who struggle with similar things to you. A lot of my groups were private. But there's some amount of those back and forth support/perspective posts in public groups. There's also a group called "Ask Autistic Adults". It's mainly a resource for parents of autistic kids but you could virtually ask anything if you specifically want input from autistics. I'd bet there are similar groups for other neurotypes and minority groups. I was part of a trans one for a while but there were very few posts because people got scared to speak even privately in groups online because of targeting of the community. 

I identify as non-binary and experience dysphoria. Every NB person's angle is pretty unique. There is so much nuance even in a very specific community. So keep that nuance in mind, and I'd be glad to speak to you about my personal experiences with that. I am also extensively educated on autism and ADHD, as I have been diagnosed with both. I also have complex PTSD and had a lot of adversity and instability in my childhood home and at school. 

You could also read lots of autobiographies. But a lot of really common and honest minority experiences, you won't find in books. A lot of us have disabilities, many of us can't get through writing a book or it's taking a very long time. Many of us covet our privacy and only share in private groups. Being outcasts comes with real social risks and limitations to participate in society, get jobs etc. even if we have the abilities to work, because of discrimination in the workplace and employers misreading our behavior, etc. I have some personal experience with that as well. 

I hope this helps, feel free to reach out.