Okay..Well...For one thing, yeah, the pose isn't the best, the arms are way too back and the elbows look like they're bending in an unnatural position. The texture is pretty nice, it actually gives that bump feeling, but the problem is that you used it on the joints too, and that'll just...Look bad, maybe try changing the projection of the material on the joints, see what you can get. Also, I notice that it's missing in some parts, maybe you wanted it that way? Or something but it looks really unfinished. I see that you're pretty new with C4D, am I right? Yeah, if so, then you will have to learn that attention to detail is what makes the picture a good one, I might be saying some nonsense but this is my opinion.
Next up, the light, it seems that you have used a default light with the default render settings maybe. For the beginning, it's pretty normal, but you'll have to do some efforts if you want the lighting to be done well (Global illumination, softboxes, some ambient light).
Adding reflection on the tori, or just the joints could be some nice addition.
The background looks just like...background, if you want to have some shadows on the background to make the feel of tori actually being there, you'll have to watch some tutorials ("Cinema 4d - Basic compositing" I think is the name of the tutorial), that's actually how I learned to use C4D, through various tutorials. I also learned to fix some issues while I was doing these tests and all.
Well, what I've said maybe is pretty harsh, don't take it too seriously, I'm just expressing my opinion. You'll eventually learn your way then when you'll look over your past work you'll say "Man, this was nothing compared to what I do now". You'll have to watch some tutorials or get someone to teach you so you learn to use it, there's no other way (Well could be if you learn by yourself but I doubt someone did that). No one is born taught.
