Greetings!

About: I've recently gotten into WoW modding and I've managed to do all the setup for noggit and WMV. My goal is to create a new type of necropolis from Legion expansion death knight necropolis with some modifications and then create a small continent/world, which would only include this necropolis flying in it. For this I've got some questions.

First, how can I edit wmo objects? The thing that I want to do is add stairways and room extensions from ND_Necropolis01.wmo to the newest Legion Acherus wmo (7AF_ArtifactHub_deathknight.wmo). Also if it's possible, I'd want to add M2 models ready in this new necropolis wmo, that I'm creating. Like, most of the wmos spawn with M2 models already implemented in them.

Second, how do I create a new continent? I'd like to add a custom loading screen, possibly Northrend's weather and scholomance area music.

Third and finally, can I make this whole project to a patch that works on Legion 7.1.x client?  I'm fairly new to this sort of thing, but I'm eager to learn it all and reach my goal.

NOTE: If you don't have time to explain all this stuff to me or if you don't feel like it, could you at least point me to the right person or guide? As much as I love to read guides and everything, I learn the best when someone's teaching me and I wish I could chat with someone through Discord or whatever to learn how to make my goal come reality.

Thank you for reading this!