World settings: Nishita vs or plus HDRI?

Hi guys,

I watched a couple of tutorials on how to use Nishita, previously I was using HDRIs.
My findings conclude that HDRIs are hard to set up/control vs. Nishita, but I find Nishita sort of sterile and boring, though it works very well and the colours are convincing.
If I wanted to add some clouds, I’d have to render them? Or is it possible to mix HDRI & Nishita? I tried with a mix node, but the result kind of was Nishita only.

Any advice for nice skies? I don’t mind putting in clouds myself, it just appears as if people are more used to the optics of HDRIs and I’m not quite there yet.