There is no such thing as an easy 3d program.... it takes a lot of practice to master, and even if you master a 3D package it doesnt guarantee that you can make stunning work, if you dont have any understanding of art fundamentals. People have a tendency to think that 3D is cool... just because its "new".
Im not going to recomend a 3D package because i dont master all of them. I use 3D studio MAX, but any package will do.
The important thing is to ask yourself is "are you ready for a tool that takes a lot of work to learn?" i dont think people should start out with 3D before they can draw with pen and paper. And preferebly have some art training.
you see a lot of bad 3D out there because people dont have any understanding of colours, proportion, shadow, texture and so on and so on.... you can even see examples in this wery thread.
i have worked proffesionaly with 3D for 4 years and i still learn a lot every day...
sry about spelling... i dont have my spellchecker hope it makes sense... :-)
good luck with your 3D exploration. :-)
updated 1. March