I wouldn't want to leave a note because people won't understand it as they failed to understand me for 29 years.
Still, I'll leave a few notes:
1 I'll put the first note right at the entrance door to warn whoever comes first. So, they can decide not to experience the trauma and call people who are ready to take it.
2 Further inside, I'll leave a note that clarifies it's a suicide. So, the authorities don't have to investigate people who are truly innocent in the outcome.
3 At my body, I'll leave a note to my family. So, when they get my body, they don't have to debate what to do with it. I don't want burning or traditional funerals because I don't believe in them doing any good. My note will tell them to donate the body and all belongings (cash, computers, servers) to research. My family failed me. I believe in my research partners to further implement the AI I designed.
I hope with my organic brain dead, my artificial mind will continue working towards the goals I wanted to achieve but couldn't because mental sickness (and people who didn't help) killed me.