What LGBTQ+ topic do you wish more people knew about? This could be a queer icon, a piece of history, knowledge about certain labels, specific philosophy topics (or notable philosopher), art, or anything else. Also if there are topics that you wish specific sub populations had greater access to or knowledge of, feel free to qualify (for example, you might wish there was greater knowledge about a specific cultural gender to all cultures which don’t have exposure to this gender, or a desire for your local gay community to be more educated on a topic important to you).
This book actually does dive into some of the older years of queer history, the 20s-60s iirc. Mostly centers on the 1950s, but it’s actually a very interesting book. Some of the landmarks are still around! None have placards indicating their importance to gay history IRL, which is a bit bittersweet when you look at all the other placards of other historic moments in history.
https://press.uchicago.edu/ucp/books/book/chicago/L/bo193960577.html
You can also buy it online, this is just a free PDF.