Blender or Cinema 4D for Motion Graphics

If you are currently learning as a student, it may not matter as both software are fairly capable tools and learning the fundamentals will be of more value for use with any tool. Depending on your location, Cinema 4D might be more popular as the professional standard app for motion graphics, but Blender is also slowly being adopted across different industries. Ultimately at a professional level, transitioning from one 3D software to another is typically not very difficult once you are comfortable with multiple 3D programs.