New Audio Engine: Quick-Start Guide

Sorry if this has already been answered (did a search). I want to sidechain/envelope follower type of ducking. Not a “push mix/pop mix” thing. but dynamically ducking things. How would i go about that? The compressor has no sidechain input.
But i’m guessing i really dont need that.
All I want to be able to do is to control a submix audio volume, base on the envelope follower output.
How would I go about doing that?

Also another case: Modulating EQ frequencies, based on distance.

I have read about “Dynamically Setting Source Effect Values in Blueprints”, in the beginning of this thread, but I’m pretty confused.
A short youtube video about these things would be super helpful. But I perfectly understand if that isnt being made.

Thanks