/3/ - 3DCG

I have very little experience with blender and 3d graphic making.
I have done some quick, rough floor 3d representations after messing around with the tools but that's it. I want to actually start learning properly and have some questions:

1. How much anatomy do i need to know to make people/animals? /ic/ goes full autist for this topic and study in-depth each muscle of the body and how it moves. Do i need to study anatomy in depth like that if i want to delve into 3d graphic making? It gets worse when i think in animate animals.
2. How strong must my GPU be? Some scenes/animations i have seen are mind-boggling and feel like would take weeks to render on consumer-grade GPUs. I tried to render a very simple floor with cycles and it took about 5 minutes. If a beginner tier design took that much, realistic animations could take months.

It feels as if i need some extremely good knowledge of architecture and universal anatomy before starting with 3d CG.