At age 14, I had to pick between drawing comic books or shooting movies. It came down to drawing was solitary and I liked getting together with my friends and throwing dummies off bridges and shooting it with a camera.
Now just because you like watching movies doesn't mean you will like making them. It's a lot of work and to be good at it means lots, and lots and lots of work. I like the advice you've gotten. Get a camera and some friends who are willing to help and make some movies. Keep them simple and short at first. I'm talking under 5 min. Don't try to make giant Hollywood movies. Do simple chase scenes. Maybe little comedies. You'll learn what works and what doesn't.
Look for other people in your area making movies and volunteer to help out. Keep you mouth shut and your eyes open. Pay attention to how they do things. If you have questions, be careful how you fit them. People making movies are focused on making them and not teaching, although some will be helpful.
Read books on making movies, watch movies, listen to commentary tracks by directors and crew. Read fiction books. Read non-fiction. Read. Read. Read. I lived in LA for 10 years and the biggest thing I found was nobody was reading other than scripts. That leads to people making movies just like movies they've seen and not making original movies. (This is my pet peeve and sorry for jumping up on my soapbox.)
The final advice is have fun. It's work, but try to make it fun.
Scott