So what exactly am I missing from Light Novels, because as far as I'm concerned, the peking order is Manga > Anime > LN.
Most of the time, chronological order is LN, then manga adaptation, then anime, then manga side stories.
LN explains the world the most, but it has a tendency to be written badly, especially for the first few volumes. Also infodumps. Likely to never be localised, so you may have to depend on fan translation, which is utterly unreliable.
The manga adaptation usually fixes this, and will be better for those who TLDR. You miss out on some elaboration though. Manga can be slow however, and may not even be translated, let alone localised. If they are translated though, they will have better translations than LNs, usually.
Anime is best for action/battle scenes, explains the world the least, has the least exposition, has a limited episode count, has the very high possibility of not having a sequel, and can be shit if the director or studio isn't good. Also depending on if it has good VAs. At least anime will always have subs, and you can always wait for better subs if early subs are terrible. Anime also has the highest probability of being localised.