Hey! Lists are meant to be like playlists for community, rather than personal. You can find more info on guidelines here or here.
You can mark books as TBR and it will automatically go to your TBR shelf (and be outlined in blue with the TBR icon when you see it in lists/ quests/custom shelves)! You can also plan out your TBR using the "Plan" function in your library.
Happy reading!