an aspiring stockbroker

[CallYNotRaise06]

my son is 17 and wants to get into a career in the stock market. i think he wants to be self employed. pretty much buying and selling stocks himself. any adive you could give him?

what should he major in?
any good colleges you could reccomend?
whats the average salary?
should he go self employed or should he get a job with a company?

thanks