For just starting out, you are doing well so far. The styles that have been used in your work is appealing and eye catching, good job on that especially, as it can be hard to do that with someone you are new with. I haven't yet used Cinema 4D yet, I can't seem to get a correct download link for it.
Also, did you use tutorials to start you off, or did you just freestyle it and work with the software on your own? Both ways are great, I just prefer to follow tutorials, makes my life easier in the long run. Getting the basics is the tricky part, but when you master those, the sky is the limit on what you can do with anything you're working with. Keep it up and hope to see more work from you with 4D.