As stated in an earlier post Blender is commonly used but the latest release does not directly support .pod export. You need to (must!) register & download the PowerVR SDK mentioned in other posts. There are some sample meshes there and the .pod export plugins and collada to pod stand alone tool.
Try Turbo Squid for models if you want some more pre-existing ones. You have to register. There are lots of totally free & cheap models.
Look at all the recent posts about models / pod etc & you will build up a picture of the current state of play.
If you have never used a 3D design tool then Blender will be fine for you. It has it's own approach that works fine.