Start with a book on understanding the principles of business. Read books on developing business plans, accounting principles and business law.

I recommend begin to organize information on the market you would like to enter, news paper articles, any leads, and just put together your own structure for how you intend on managing anything which comes your way.

This may sound like its "too early" however in actually it is never to early for organization. Good luck in this venture and your many endeavours in life.