Look, at this point I'm basically just "That guy who recommends the Luna books", but this is yet another situation where they really are the right answer. Luna: New Moon is your starting point. The series is absolutely bursting at the seams with diverse and interesting female and non-binary characters. It also features some wonderfully atypical male characters who really play around with our understanding of what it means to perform masculinity. I am obsessed with Lucas Corta, iron fisted patriarch whose one weakness is for the beautiful young man who plays bossa nova for him, and I'm equally obsessed with his son Lucasino, the rich kid playboy who has fucked his way through his entire friendship circle, and loves makeup, androgynous clothes and baking.

Anyway, Luna: New Moon by Ian MacDonald. Give it a look.