Hello @Illusionist! Welcome to Rokkenjima! It’s so nice to meet so many new faces in one day! Thanks for bringing a friend with you, @AMF! We really do love new people here! I’m really excited about all the things you newbies will bring to the table! What I recommend for you is post your thoughts in the spoiler free topics for Umineko and Higurashi! That way you can attempt to solve the mysteries of Oyashiro-sama and Beatrice with other detectives by your side! Good luck solving the mystery, kyahahaha~ 
You can also catch up on the past tea parties by listening to our lovely podcasts (which you can help host)!
Our next tea party will likely be on Higanbana, so I recommend reading the rest of Higanbana along with the rest of Rokkenjima by your side once that tea party officially starts! It is so much more fun to experience these stories with others by your side. The same goes for the rest of Higurashi and Umineko too! If you can, please wait to read these with everyone else, that way your experience is even more complete. We are reading along with the Steam rereleases anyway, so I really hope you are willing to wait! Believe me when I say it’s worth it! In the meantime, you can check out the other 07th Expansion stuff like Iwaihime (which it sounds like you’ve already started!), Rose Guns Days, Hotarubi, and TRianThology!
Since you’re so interested in writing, you might be interested in checking out the literary bar! It’s the magical gathering place for all of Rokkenjima’s writers! You can also show off that Umineko manga collection, talk about music, talk about your hobbies, talk about your favorite books, talk about your favorite movies, talk about animated movies, talk about mystery novels, you can even share your pets!
I’m certain you’re going to find a quick home here on Rokkenjima! Thanks @AMF for sending @Illusionist in our direction! I really hope the two of you can find a home in our community here! Enjoy your stay~