Middle and High School for nerdy kids?

I've got a tween child who is smart but has ADHD. They are becoming increasingly socially isolated and are feeling "not normal". I'm probably biased, but I think my kid is cool and interesting. I'm sad to see my kid feeling so out of place at school. I'm wondering if there are schools in Oakland where my kid has a higher chance of finding friends with similar interests. 

Kid loves D&D, Star Trek, chess and most board games that involve strategies, The Simpsons, Ken Burns documentaries, Stranger Things, video games, rock music from the 80s and the 90s, and musicals. Kid does not like sports but likes to sing, act, and dance. I wouldn't say my kid is exceptionally talented in singing or dancing, but it's something they enjoy. My kid is a pretty decent actor. 

We're open to private, charter, or public. Really any type of school where there might be enough kids that share similar interests. I wonder if school is just going to be hard for my kid for a few years until they go to college. Kid prefers talking with adults than peers at this time and I am concerned about my kid's social life and development.