This is actually awesome! It really looked like raw, graded footage. Did You grade in Davinci? Or what did You use?

I´d suggest two things. One, apply for jobs as an assist, runner, or even a boom operator on low-profil shoots. Just by being on the set You´ll learn a lot if You watch carefully.
Two, go and shoot something. I guess the best way to learn is to do it (or at least try), and shoot a shortfilm. Start with thinking about a story, ask friends to help out with acting, get a camera & tripod and think about how to bring the story to screen. And then shoot plenty of material, get home and start the process of editing. Don´t be disappointed if Your first piece sucks - I´d suggest that every filmmaker did some crappy pieces at the beginning - but that´s where You learn. You develop Your style by discovering what You like and what You don´t like, get experience about shooting techniques that work and don´t work, and over time You enhance Your results.
In the end, always get some people around You that are blunt enough to give You honest feedback.

I guess that´s out of the Budget already for just the Controller. I would be willing to spend a Little more than 3000$ for lens including remotes, but not much more.
Thanks for Your answer though.

A zoom-range above 10x would be great. If You mean remote zoom-and focus control by ENG-style than yes!