Mahendra singh

Hello, I am Dr Mahendra Singh and I am a neurosurgeon aged 44. I want to learn 3D Coat (actually 3D anatomy for illustrations),last year after lot of researches I found out that 3d coat should be better than ZBrush, I am still clueless as to how to start? What all can be provided by 3D Coat if I want to create - suppose Brain surgery sequences, only form? or colors too? What about the environment of the diagram? Z Brush is extremely organized in terms of anatomy teaching while 3d coat is not. I am considering buying ZB as well owing to plenty of anatomy tuts of the same at all forums. Can anybody guide me how should I start and what I should do further in an order to become an excellent 3D Artistry. Thanks