Agents and producers learn by doing. There are seminars on producing, but internships are the first place to go. You've heard the phrase "started in the mailroom at William Morris/ICM/any agency"? That's where observation comes in. Its the lowest rung on the ladder, but where some (but not all) of the best and brightest go first to watch, listen and take notes how the biggies do business and cut deals.
Anyone can be an agent. Being a good agent is a stressful, time-consuming job. It doesn't matter which coast you're on, the other one is three hours away.
Go to college. Anywhere. That's where one learns to be sort-of an adult. Its the socialization process.
Theatre Communications Group which publishes American Theatre magazine would be a good resource as to which school offers which program. (I think its TCG.org) There's producing as in "David Merrick presents..." and there's producing for regional and resident companies as in "Managing Director". Big diff.
Good luck. Have fun.
"If my life weren't funny, it would just be true. And that would be unacceptable."
--Carrie Fisher