Keep in mind that the Blender Open Movies are made by professionals who've been doing what they been doing for a long time, and there is a whole team making those, with roles specific to the area.
I don't think you could single-handedly create something like that at the same timescale as they created it. They basically have made a proper studio at this point and they're fine-tuning the workflows and processes of Blender by doing these movies.
So don't feel bad if you never would be able to create this alone, it is a team effort after all.