Question

I am trying to create a walk cycle with a rigged character, where can I got to get started ?

Answer 1

Try Autodesk Inventor, easy to draw, good for movement and phisics on mechanisms.
I've made some mechatronic projects, and believe that this program is pretty enough for all projects; I woud like to see why and when I will need another program on that Autodesk series.
Avaliable on Autodesk Download Center;
http://students.autodesk.com/?nd=download_center
Good luck.

Answer 2

Use Autodesk Maya is really useful to make some characters, you could download a rig if you don't know how to do it, and need to do it fast. Maya animate really good, there are some tutorials to make the walk cycle.

Answer 3

nice