If you want to be an investor, read - "Investing for Dummies" by Eric Tyson
The "stock market business" is a very BIG industry, you'll have to be more specific
Do you want to work for a brokerage firm, a bank, a mutual fund, accounting firm, clearing firm, data processing vendor
Do you want to get into sales - what type - retail, institutional, corporate, - what do you want to sell - equities, fixed income, ETFs, mutual funds, commodities, clearing services, trading services, retirement services
Do you want trading - what type - equities, fixed income, commodities, funds, brokerage services, and what markets do you want to work in - listed, over the counter, private placements, commodities,
Do you want to work in brokerage support - accounting, law, technical, data transmissions, data processing, office LAN, programming, margins, dividends, ACATS, ReOrg, Transfer, Retirement Plans, conversions, compliance, cashiering, sales assistant, ,
Based on the wording of your question, no one can provide you with a proper response.
from the street