First, re - watch or re - read Oshi no Ko to really get a feel for the characters and the world. Note down their personalities, quirks, and how they interact with each other.
First, you should familiarize yourself with the Oshi no Ko universe, including the characters, their personalities, and the overall story arc. Then, come up with a unique concept or plot. It could be a simple 'what if' scenario, like 'what if the main character didn't pursue a career in the idol industry?'
Oshi no Ko manga hasn't reached its conclusion. It continues to captivate readers with its evolving plot and characters. So, keep an eye out for the latest updates if you're a fan!
Oshi no Ko is indeed a weekly manga. You can expect new chapters to come out every week. However, there might be occasional breaks or delays due to various reasons.