Currently I am learning some Plasticity, a CAD designed from the ground up to be more friendly for artists. I have only done a few exercises following https://www.youtube.com/@nikita.kapustin
He seems he has been using Plasticity for a few months already and has a lot to teach. I am not entirely sure on his teaching techniques as he rambles a lot and lacks structure, however it is currently the only You Tuber that has content to show, if anyone has anything to share on Plasticity in terms of tutorials, let me know! He also has a a tutorial site at https://www.skool.com with Ultimate 3D. 
https://www.instagram.com/p/CvzeFVkLqoL/
I hope with time that I can focus on hard surface modelling with a combination of Blender, Plasticity, 3D Coat with a focus at doing props for some time.
Because none of this it portfolio focused I shall update it in the Blog or Instagram for now.