JAAS

So I am trying to learn how to randomize fire emblem conquest, I haven't set up the homebrew or anything so it is basically from scratch. I would appreciate help like maybe a tutorial that is up to date or just instructions that I could get here. I have the latest update on my 3ds I don't know if that stops me from randomizing the game. I would like to experience it randomized as a fun challenge and change of pace so anything helps. I would greatly appreciate it.