Hey Cababa,
I've had a 15 year career in motion design.
Doing sculptural work like your references are going to be fun to make but probably pretty difficult to monetize. I recommend you practice what you love, keep it fresh and a studio may like to incorporate your style into commercial work. Continually develop a demo reel to get those commercial contracts. Start billing those at around $350/day (US) In a few years you can get up to $500/day.
As far as technique, of course I would recommend c4d and a good renderer. For GPU rendering use Redshift or Octane, if you render on your CPU use Corona Renderer (more for archive). Knowing these will help you pretty easily get into commercial production for a little film but mostly commercial agency and corporate brand work.
For your references get good at displacement mapping and volume rendering. Get Xparticles as a plugin.
Best thing is to learn the fundamentals, sounds like you have a base in sculpture, great start, learn about 3 point lighting, color theory etc etc. and buy Drawing On The Right Side of The Brain, its a classic to help you tap into the subconscious well of creativity.
For animation, learn the 12 principles of motion.
Follow Motionographer, School of Motion and Wine after Coffee.
Most of all, never ever ever never ever stop learning, learn every day. Learn to pick up new software and just click around, break it and restart fresh. You'll develop fast.
Have fun!
Gabriel
