Yep, basically what @whitetigress said. The bottom line is that the music industry is big business just like any other. You basically have two options. You can try to do your own startup company or you can get a job in an established one and work your way into the position you want.
With the startup option the cards are stacked very heavly against you. The big guys pretty much have the industry sewn up and like to keep it that way. It’s basically the equivilent of wanting to start your own operating system company. Sure, it’s possible, but your compitition are people like Microsoft, Google, Sun, etc… At best you can carve out a nice little niche market that will make you a living and if you are extreamly lucky in a decade or so your little niche might become a small part of the “main stream”.
Going the route of signing on with an established player also takes time and effort, but has a much clearer path to “success”. But understand that in this case success probably does not mean most of your time is spent cruising around the world in the corporate jet partying with your favorite rock star. It means you have a steady well paying gig that will cover your morgage, give you a nice benifits package that includes health insurance, and enough income to comfortably provide for your family. As with any corporate gig, you don’t just walk into the front door, shake hands with the CEO and expected to be appointed Sr. VP of everything cool. Just like applying for any other corporate job, you go to school first and get a degree in a related field, then you sign on for one one of those underpaid and overworked intern jobs where you have the opportunity to prove your worth before being hired as a “real” employee. From there you play the corporate “do da” game until you weasle your way get promoted into the job you really want.
Q. Why do corporate record executaves wear neck ties?
A. To keep thier forskins from flying up in their faces.