I did a pastel workshop a few months ago and I found it quite difficult to get a good likeness of the sea.
The detail is so hard to reproduce. Especially the soft, spray, and foam areas. The colours are also difficult. As you add pastels to the paper surface it catches in the “tooth” of the paper. The problem is that some of the paper’s are like sand paper, and could take the skin off your fingers! I wonder how to handle the pastels to get a softer effect.
I think I would go back to another workshop to gain more skills. I enjoy trying out new materials and techniques. There will be a charge for it, but it is worth it for the experience.