Well i never used Cinema 4D. But if you are looking only for visualising your ideas and don't want to bother with render settings etc , etc... you can go on with C4D but if you are looking for 3D job or smth like that you can't get it without knowledge of rendering and other stuff. You choose your best way of working
Btw I was stuck with making 3D island in Maya it was a horrible thing for me but i found Vue 6 Xstream and there i made on good looking island so ... maybe C4D is better choice for you don't know mate.

p.s I'm looking forward to find a job for me . Maybe in 1-2 years , so i work hard in my free time and try to learn every little detail of 3D work , no matter is it new software or new function or smth like that.

Wish you luck dude.