I hate to be "that guy" but you need a reality check.
1) You're probably barely 18 right? You don't have any credit, no assets, etc. This will make it difficult to "discover" the next great voice/artist and get the word out.
2) Networking takes experience. Successful producers/agents/record companies need to be well connected. If you're just breaking into the industry, you'll need to first make useful contacts.
3) You need practical knowledge about contracts, business management, etc. Unless you have some experience with this (your parents are attorneys/MBAs or own their own business, or you've interned at a successfully run business), this will be the greatest challenge before you.
There are probably other more salient reasons why you shouldn't rush into this, but this is the best I could come up with right now.
If this is really a dream of yours (and I'm never one to discourage dreams, because that's how progress happens), I suggest you first find a job within the industry. Get an internship, or a job, or get some practical business knowledge under your belt (take accounting classes, business management classes, etc) or anything else that can help you get prepared.
Also, save, save, save! You'll need money to last you a while if you don't have a steady flow of income. Thus you'll need savings to get you through the tough times.