I know how my series begins, how it ends, and how the characters get to the end. I do have my 2 major protagonists and my major antagonist (along with his henchmen who serve as antagonists). I want it to be a webcomic trilogy. I also do have a general idea of my world building. I plan on making some chapters feel episodic, like they have their own story but in the same way have relevance to the main plot itself. However I don't want it to feel like a monster of the week all the time (although I do want to sneak some of them in). If you want to know more I can edit the post. But I am asking how do you write a series (whether its book, tv, or comic)?