This photo is the refrence. How to do a sky and clouds to match the one in the picture?
So far i’m here:
there are free addons and also paid ones that do this pretty nice IMHO 
The one i use suits my needs:
But am not sure that it’s able of thick volumetric clouds 
Happy blending !
Tanks, by the way wich is the name of the addon?!
open preferences>addons and type in ‘dynamic sky’ 
nice 
keep us informed on amazing skyes you will make
Happy blending !