How do you open the Stock account in US market?

There are stock brokers in every city and most towns in the USA; talk to one of them. Or open an online brokerage account with any of the "independent" discount brokers like Charles Schwab.

But you're a fool to buy individual stocks in the Stock Market if you don't have a REALLY GOOD idea of what you're doing. In fact, the predominant trading technique in most stock exchanges is the "Greater Fool" theory. Even the best and brightest stock pickers generally do worse over the long run than the major market averages.

If you're interested in investing in the stock market, talk to a mutual fund broker and buy a stock index fund. But understand the risks, first; this is a terrible time to start out in the stock market.

Read the Wall Street Journal, Investor's Business Joiurnal, Kiplinger's, and Barron's every day for a year. Create some "dummy" investments and see how they do before putting in any real money. Then stock your pantry with 2 months' worth of shelf-stable food before wasting////// investing any money in the stock market.