In the video conference yesterday, I mentioned a regular writing challenge I take part in, called Rough Trade and can be found here: http://www.roughtrade.org/. It takes place in March, July and November. Each month, a word count and topic is given and a topic set. Sign up is the first three weeks of the month before the challenge. Both fanfiction and original fiction are possible. The challenges this year are inspired by the TV Show The Sentinel. The challenges next year are Soulmate in April, Paranormal Romance in July and Time Travel in November.
It's a community for writers. To quote the organiser, it's "about providing a community where authors can come together and create without being shamed, abused, or discouraged by the reading public".
It's called Rough Trade because everyone is posting unedited work. The aim is to finish a first draft of the story, instead of getting lost in editing the same scene again and again or getting lost in researching the perfect name for a minor character.
The other resource is in German, I'm afraid, since I am from Germany. There is a reading festival here, called Queer gelesen (queer read). It takes place from Friday to Sunday, generally in April (this year they might have it later or have the next one in 2021, no one knows yet). Authors present their books with gay, lesbian or trans characters. Each time slot is 30 minutes in which they read one or more excerts from a book, then answer questions. On their homepage https://www.queer-gelesen.de/ under Archive, you can find the programs from the previous years, listing the authors and information on the books presented. They try to find a good balance each year with different genres (fantasy, historical, coming-of-age, drama, romance, ...). On Sunday morning, there's an authors' brunch where authors and visitors can meet and talk, both about the books, writing and whatever else they want to talk about.