How Hard Is 3d Modeling/animating In Maya? Cinema 4d?

I’m 13 and i’m interested in learning 3D modeling. i wanted to ask how easy is it to learn how to do it? i have Autodesk Maya 2010, and Cinema 4D for Mac.
which one is easier to learn. i already do programming (C, and Objective-C), photo editing (photoshop, Aperture etc.), and Video editing (Adobe After Effects, Final Cut Pro etc.), and now i wanted to start doing something more exiting in addition to all these (all these things are pretty dull)
are any of these harder than modeling? i picked up photo/video editing pretty quickly, but it took a month or so for me to fully grasp the concept of programming. i learn most things pretty quickly though.
i will create vehicle stunts and crashes etc. when i learn a sufficient amount of knowledge to do so.
heres a video of something similar to what i want to create when i become very experienced in 3D animating:http://tinyurl.com/2a6pm7z
are both programs capable of creating something like this? i know Macs are not designed for 3D design, but my whole family uses Macs, and we only have 1 PC in the house and it only has a 2Ghz Pentium and 2GB DDR2 RAM or something silly like that (plus Windows Vista, which slows the whole system down).
Thanks. sorry for such a long post, i like to type long questions, haha