Harmonica, I want to make an series of illustration for you, because i think illustrations helps people understand things.
First, why do directors have to learn about camera and editing and acting and sound if those jobs are going to be done by other people? well...
When you were in school, you learnt maths, you learnt English, you learnt art, you learnt history and you learnt science. You might have also learnt some instruments
BUT did you become a mathematician? no. did you become scholar in Shakespearean study? no. did you become the next Picasso? no. did you become a historian? no. did you become a theoritical physics or become the mozart of the new era? no.
HOWEVER, did all those things help you? YES! They helped you better understand the world around you in all aspect, not to mention aid you in learning self control, time management, socialization, as well as seeing things from different perspectives. Sure a lot of the knowledge you later go on to forget. (eg. I got a scholarship when i was in high school for chemistry but now i can't even recite the first 20 elements on the periodic table.) But the essence of those subjects stays with you. You get a good sense of things.
SO Filmmaking is exactly the same. When you are beginning. You need, you absolutely NEED to have a go at all aspects of it yourself. You don't have to go to a film school and study a degree, majoring in each and every single one of those, but you need to understand them. So that later on, when you are working with actors, lighting people, editors, camera men, you'll know what they mean when they talk to you. So when they ask if you want a 3 point lighting with shallow field of focus, or whether you plan for a additive dissolve between the clip, you'll know what they mean, and you'll know what it looks like, so you'll be able to make those decisions as a director.
Conclusion? Start small, start as if you are a child, first day at kinder garden. Kinder garden teachers don't usually give 3rd order ordinary differential equations out as homework for the first day. Forget about lighting, forget about the boom stick, forget about the actors even. Just you, and a cheap handheld camera. Go out and do a film with your toys like what Alcove Audio suggest. Though stop animations can take a bit of time, in which case, Just have your hand in there. See your hand moving the characters around. Or go out and make a documentary about your neighborhood. Port it to computer and add voice over plus some nice music. Forget about color correction or sound effects.
When you are done with that, post it here, we'll all give you some feedback and encouragement (Won't we guys?) And you can go on to do your next short, maybe with 1 actor, or with a slightly longer story. Just take it one step at a time. It's how all of us made the first step.