Quick question. I started a realm for my single player world because I play on Xbox One and I want to have the new nether so to do that I had to switch to windows 10. Anyways, I was wondering if there was a way too turn that realm world back into my main local world?
I don't know about the Realm to Local but if you want the new updates on Xbox One you need Bedrock.
Its a weird case where they dropped the 'Editions' versions of Minecraft and now just have Bedrock which is called 'Minecraft'.
Check the Store and you'll see 'Minecraft', with a quick search it seems the 'free' Bedrock period ended last year as you can see by a few sources: https://duckduckgo.com/?q=how to get minecraft bedrock on xbox one&t=ffab&ia=web. So I'd say if you don't want to buy the game again on Xbox One to get 'Minecraft' then stick with the Xbox One Edition and use the Windows 10 one instead for the new updates and play with a Controller.
The thing is when you get 'Minecraft' you still keep the Xbox One Edition as 'Minecraft' is separated from the Editions to be the version people will get now (meaning you'd have two versions on you, the old if you still want it and the new). It's a bit confusing but any 'Edition' versions are legacy while Bedrock or 'Minecraft' is the version for all Xbox One, PS4, Switch, Mobile & Windows 10 platforms to get the new updates, play together and so on and removing the 'we have to develop for 10 platforms and we complicated things' to now have it so they can develop for fewer and the process is much better than before.