Let's say I have 30 of something, like books or gems or other random junk. If I want to add a single (randomized!) book to every NPC, I could have a SPID line for each book at 1%, but that means some NPCs will roll and have many books, and it's just clunky and bad and if you have a ton of items, it falls apart fast. Is there a way with SPID, or another way, to make the NPCs only get 1 of an item, while the item is also random? I know there's leveled list, but I'm only finding guides to make them in the creation kit, not how to implement them.
Note: I'm not a modder at all, so if there's tutorials to link I would appreciate it!