I have and use Blender all the time. In my opinion, it is by far the best open source 3D software out there. I also have a full version of C4d. The UI is different for sure. Some of the tools are different for sure, but the underlying theory is basically the same.
The most important thing about learning 3D animation is not the software. The most important thing is learning how to create a design that tells a story. The most important skills, the ones that will change you from an assembly droid making minimum wage to a skilled professional making a good living are not specific to any software. It does not take a very long time to learn the UI and some techniques in any specific software. What does take time and a lot of practice is learning how to set up a scene, frame up and move the camera, and move the models creating the illusion of life that is critical to good visual storytelling. A set of colored pencils and a few sheets of paper and some practice will make you better at the really important skills you need to tell a story than any specific software.
If you really want to learn and you have no budget take the time to learn how to create some really fantastic scenes in Blender, tell a story, and put the scene in your sample reel. If you get hired by somebody they will be much more impressed with your ability to tell a story visually than the software you used. Anybody can learn a UI and how to apply an effect. Very few folks have the determination and tenacity to learn how to be really good storytellers.