Hello @Zepfur! Welcome to Rokkenjima! @Rabla. @StarTurner, @MagusVerborum , and @Aspirety are also from Australia! It’s nice to know you aren’t alone in your part of the world. I think it’s really cool how diverse Rokkenjima is. You’ll meet people from just about everywhere here, and I think that makes us even more interesting!
You sound like quite the Higurashi and Umineko veteran! But have you heard of the newly translated arc, Someutsushi? It’s a really fun side story that I think you might enjoy reading. Since you are a veteran, I recommend checking out the spoiler threads for each of them! Threads are separated by arc for Higurashi, and by episode for Umineko! There is also a topic for general Higurashi spoilers and general Umineko spoilers! You can also talk about your favorite scenes for both Higurashi and Umineko, as well as talking about the moments that made you cry. Of course, there is also a thread where you can gush all about your favorite characters!
However, the best way to get involved around here is to check out our tea parties! So, what we do is we pick an 07th Expansion work and read it all together, then post all of our thoughts in one of the spoiler free threads! That way we all read together, like one big happy family. So far, we’ve covered everything rereleased by Steam (so Higurashi arcs 1-5, Umineko eps 1-4, and Someutsushi). Our next tea party will likely be on Higanbana! However, right now we are taking a bit of a break from the tea parties. This means you have plenty of time to catch up on reading our crazy theories about Higurashi and Umineko in the spoiler free threads or by listening to our lovely podcasts that summarize the discussion (which you can help host)! There are also threads for Rose Guns Days and When The Game Ends, which I see you’ve already posted in! 
There are also threads for Iwaihime, TRianThology, and Hotarubi!
There are many other fun things to do here too! There are many off topic threads, where you can talk all about your favorite Sailor Senshi, music, books, cooking, hobbies, writing, theatre, pets, your VNDB list, your MyAnimeList, even how much you sleep! There’s a little bit of everything for everyone, and I think that’s part of what makes us special.
I sincerely hope you enjoy your time here on Rokkenjima and get to make some friends! Enjoy your stay~