I read Suicide Notes. It's an extremely heavy book with about every trigger possible buried in it, just as a warning. I'm not going to say what exactly it covers from the LGBTQ+ spectrum, but it really let me see into a different world. Someone else's world. It's a fiction, but it's not a fantasy; it feels like living someone's real life. It's incredibly moving, but it is very depressing (the name is a good indicator), so keep that in mind before deciding to read it. I learned a lot from it, including things about myself. I'd highly recommend it if you're willing to get really sad about it; I feel it was very cathartic for me, and it's a great portal into the queer experience.
Also, there is a sequel called Every Star That Falls. I'll be reading that at some point, but likely not especially soon.
Yes, it is possible, as per your linked resource, however it would be up to the server maintainers if they feel it is reasonable to do. Note that federation is not supported over Tor, so federation would go over the clearnet via the original instance. This is not an issue, because the only thing that would be useful for Tor is hiding the client connection IP address, which would be handled under this configuration.