There is one course I would love to see: Curves!
I know there are several videos on Youtube that explain the curve tool in Blender, but there are no in depth-courses where it is only about curves. I would love to learn curve tool in a wide variety. Especially when I want to model with real life measurements. Also exercises, where I could learn to master curve handles (and how their segments works). I already tried to understand curves from reading the blender manual…but naaaahhh….totally boring and it doesn’t help me when it comes to the practice part.
(ps: sorry for my poor english)