Ohh the good old Amiga. I had a 500 and a 2000. and yea i know scala.

Our local TV station used to run it in the old days and i knew the people working there.
And i ofc got a "free" copy of it to play with.
Yea animating characters is hard.
I am not sure what kind of documentation you are looking for.
Its not magic, you just have to spend time tweaking and fiddling until you get the result you want.
I am far from any expert in animation, even tho i use a good software its still time consuming.
And porthub was just a partly joke. a scene from a movie can be a good reference when making a animation.
Just grab a few short clips here and there from movie/scenes you like.
as you probably know you will find all from soft to hardcore on that side and alike.
The problem here is, we dont know what your story is about or what style you want.
Even if we know what the story was about, we all probably have our own opinion on how a scene should be like.
You want you own style so you need to experiment until you find it.
I don't think there is any standards when it comes to making porn anims.
This forum is probably one of the best sources to find info/tutorials on this topic along discord perhaps.
Poke around in misc forum sections / search is an option too.
The only thing Daz is better at is providing NSFW assets.

Blender dosent lack tutorials in general, there is a ton of them out there.
Exporting is always a pain in the ass. esp if you want gentiles and morphs from Daz.
But Blender had this diffo tool or what its called, that should allow the import of Daz models to be less painfull.
Once you get the exporting/importing workflow up and running its another world.
I have tried using Daz a few times. and good lord i wanted to shoot me self each time i did use it.
So i have become familiar with a export/import procedure instead, "that works for me in c4d".
I have no idea about a realtime engine like Unreal.
But i can see problems arise with cloth. especially if its a tight sitting dress.
In c4d, I can add in a constraint. a cloth colider on the body and even set the parameter for how close before the colition.
But in a realtime engine that would probably be hard to do as it requires massive calulations.
Also that the body of genisis models uses a mix of deformation on the body.
Some parts are deformed by bones, "alot of that in the face". and some parts are just modified vertices.
There is "always" some issues when traversing between 3D tools.
And i can see your point in that you,, "just want something what works" so to speak.
Then again, if you really want high quality animations, Daz is not the best option.
But if you can wrap your head around Daz and actualy use it, Why not. whatever float your boat.
Its just not my cup of tea as a 3D tool. I do like the assets one can get from it tho
Anyway have fun on your 3D animation vetrure.
Cheers old Amiga mate