I would say narrow it way down. Basics like recording at home have been covered to death by people on youtube. Save the time and effort for more useful information 
I don’t know why people use stuff like FMOD. The engine seems perfectly capable on it’s own already am I missing something? There is already a great tutorial on FMOD integration but I have never seen anyone cover Wwise so that might be worth doing.
As far as controlling sound in the engine there are quite a few tutorials and example projects covering the basics of it like changing volume and building an audio settings menu in your game. What they don’t cover though is stuff like cues, reverb and so on. The most useful thing you could do a tutorial on is how audio assets are handled within the engine. Tutorials on attenuation, reverb, occlusion etc. Also some less obvious things like keeping the soundtrack of the game consistent both in quality and volume. Basically a best practices for audio assets. Even though it’s been done many times something on using audio to your full advantage artistically in your game could be great. Everyone has a different perspective on that or some additional bits of advise on it so you can’t have enough people talking about that really.
I have a decent understanding of a lot of this so for me I’d like to learn more about creating dynamic sound. Is that the right way to describe it? Basically using lots of individual audio assets to create a mix that changes based on what is happening in game. I know the engine can do a lot more now but I haven’t tried actually creating audio with the engine so that is still a mystery too. Those are a bit more advanced though so maybe start with the other stuff lol.