To begin with, thanks a lot for the course which is very detailed. It was my first course on 3D modeling, and I did learn some valuable skills.
So, I started by following the course while reproducing what you showed and explained. I ended up with a well which is very similar to yours:
After that, I thought I should try to make another one from references found on the Internet, without copying too much elements from the other well, and also avoiding to re-watch the lessons. And here is the result:
Some elements may need some ajustment, by I'm still glad with the overall look, and also happy with what I manage to produce with the rope (even if it is a bit too chunky).
(I rendered all of those with cycles and 3000 samples)
Thanks again, and I'd be glad to read your review, if you have the time to do so!