Blender is a FREE 3D creation suite and a complete 3D pipeline:

Modeling.

Rigging.

Animation.

Simulations.

Rendering.

Compositing and Motion tracking.

Video editing.

2D animation pipeline.

Blender is easy to use and has a big community that can help you if you get stucked:

YouTube has a huge amount of tutorials that you can use for free.

Facebook has groups for both beginners & advanced users of Blender.

You can download Blender at Blender.org