I'm to an extent the same with my personal canon Rockverse, as well as overall with the research I've poured into the Rune Factory series. However, I've tried to make myself more open to stuff.

To new entries into the rp world, the best thing to do is lay out a basic set of information, the minimum they'd have to know on entry. Like if they're making a character, what's the absolute minimum that's needed? More dedicated players may dig into more stuff. As someone who has overwritten stuff more than once, yeah.

In all honesty, even though I've been at work on chipping away on my personal stuff, I don't think what I have reaches that much. Granted, its mostly been me alone with my research. And a lot of stuff unwritten. As someone whose personal OC is in a sense a lore glimpse into an entire verse, yeah, loads of respect.

I'd say being protective is fine, but take it like this. A player is gonna make mistakes if new, if its not a serious one, correct them IC. Like have an NPC pipe up, if its during the course of a narrative. Otherwise, if OOC, feedback is key. You can either tell them directly, or pick them up in DMs and chat about it.

Dunno if what I'm saying is quite clear, its late, I'm tired, and mentally drained from a lot of writing today.