The guys who have posted here are right - ya gotta pay your dues, learn the ropes, gain experience, ect. BUT...
...I'm also a believer in, forgive the cliche, "True Grit" and the benefits of someone who toughs it through to get the door of opportunity open. No, you don't want to leap into a sea full of sharks (and that is what it can seem like at times in the video business) but you can test the waters, ease into action, then start kicking into higher gears as you develop the necessary skills.
Some people are too inclined, too often, to spend too much time paying for a education, researching the next best thing and putting off ANY forward action. That is not everyone's way. Some do it dumbly by jumping in on an emotional whim, others do it smartly by cashing in on the practical reasoning their left-side brain provides but they often lack perception from their creative (if any) right side. There are a boatload of folks who sense the opportunity, know their limitations (mentally, emotionally, physically and fiscally) but are willing to intelligently "jump in" depending somewhat on the "luck" and lightning strikes that might occur.
So, while there are a bounty of practical ways to approach this business - and the above "pay your dues" approaches are a reasonable suggestion - there are also elements, voices and strengths within you that might push you harder toward jumping in.
I was impressed (and still am) with the story of Lee Stranahan, former renown Video Toaster guru who, with the support of his working wife took a year off from making money to delve into and learn the NewTek system that was wowing the Amiga community with its video editing capabilities. Sure, Lee had some general knowledge of things, I do not remember his pre-Toaster background, but nonetheless he invested a year into digesting and becoming intimately familiar with a completely new system. The effort paid off as he gained a reputation for knowing the Video Toaster inside and out - to the extent he once released a GREAT how to video that said: "Ten Things You Can't Do with the Video Toaster - and How to do Them!"
So, if you think you can do this, and you WANT to do this, and you feel like you owe yourself the opportunity to make it work for you. Just do it! You'll learn a lot along the way, or quit - either way you've not wussed out of trying. I keep hearing my late Mom, telling me: "Great ideas won't work unless you do."