Ok, so you're already working as a generalist, essentially. And this is sort of the digital illustration output of your learning process with C4D. I guess the question was really "Is there a specific goal you're working toward, like doing visual effects, or motion graphics, or archviz, etc.?"
Doing this stuff for learning purposes and posting it is fine, but it's a little hard to critique. I mean, I could tell you I do or don't like your color choices, or I do or don't like your tendency toward centered compositions or textured overlays and heavy compositing, but it's all really subjective. I can objectively say things about whether a certain image is achieving photorealism (although I get the feeling that's not exactly what you're really going for). It's all either guessing what your goals are, or making really subjective statements, and as a random dude on the internet, I don't know if you really want either of those from me.