Find some people IRL who share your interest and enthusiasm for filmmaking. They don't have to be professionals, and you don't have to pay for a fancy film school, but opening a discussion with real people about technique is the best way to start learning. Watch movies with these people, press the pause button when something grabs your attention, and talk about it. How would you achieve something similar? How would they go about it? What could be done better, and how? That's step one.
Step two is the hard part. Actually go out and film stuff. Use your cell phone if that's all you got. Actively try to emulate the shots, looks, edits, sounds and techniques that caught your interest in step 1. Develop an audio/visual vocabulary. Make up words if you have to. Once you start to have more conversations with more people who have similar interests, your terminology and your expertise will begin to converge. You'll know what a c-47 is, and how to use one, in no time.
In your "spare" time, the internet is a great place to supplement your knowledge. Sites like this one are a great place to ask questions. Bulletin boards, video hosting sites, and social media are great places to get feedback on your work. Search engines are wonderful for fact-checking your intuitions. But nothing beats real-world interaction with people who share your interests.