3D Modelling is something that comes with the Digital Media Design(DMD) syllabus, meaning that every DMD Student is expected to have the skills to 3D Model when their life depends on it.
Why is 3D Modelling important?
We usually teach Blender in the Fablab for students who are new, unless you have C4D experience we usually recommend Blender or Onshape. There aren't any proper tutorials that can be provided here as it is a skill you learn over time through practice and failure.
However, there are links which can be provided here for you to learn by yourself. DO NOT REFERENCE THE DOUGHNUT VIDEO ON YOUTUBE.
We use Blender and Onshape for 3D Modelling!