This guy is asking to just start out, I doubt he's going to need to collaborate with dedicated lighting designers, audio guys, etc right now.
Why not?
I can't think of a better way to learn than to volunteer on the
sets of other filmmakers. Setting up c-stands and flags for a
dedicated gaffer is a great to learn about lighting. Pulling cable
for an audio guy is a great way to learn about recording for
movies. Labeling tapes for a DP is a great way to understand
what the camera department does.
When I was 15 I worked on a college film doing a little bit of
everything. I met a girl who was the camera assistant on that
film and we got to talking about a film I wanted to make. She
ended up shooting it for me a year later.
shellbee, you don't need to own a camera to be a director. It can
help, but it's not necessary. Volunteer on other peoples movies as
M1chae1 suggests. Meet other people with the same interests as
you. You might meet someone who already owns a camera who is
willing to shoot your movie.
You say you're interested in acting. Act for free in other people's
movies. Talk to the people in the camera department. Who knows?
Maybe the assistant wants to be a DP and the boom op wants to
be the recordist.