How to Write a Trilogy

In my dabu novel, which came out a hundred years ago, ten years ago, actually im almost to the day. An entire trilogy takes place over the course of 14 days because i didn't outline that first book. And specifically for big casts, when i have an ensample cast, i need to sort,. i need to know where everyone is. If you don't like using paper to outline, there's a programme that i also use called scapl, which is by the people of scrivener. I don't know if you guys have heard of it, and it's basically, just like you could do index cards, ot it'm like 12 bucks or something