Well for one thing, investing in expensive equipment to then see if you are any good is definitely not the way to go.
I'm in the same boat you are right now, wanting to get into filmmaking, and what I've relied on the most is to just be a sponge for everything related to filmmaking. If you can afford to go to a film school (especially the well known ones), that's great and I would do it if I could afford to, but don't go that route just for the education, do it for the education and the networking opportunities. (Also access to good equipment)
It's one thing to research and read about film, but the actual experience of working on one is another thing entirely. Basically just get experience, any way you can. You may actually find you want to be something other than a director or a cinematographer.