Could someone please give some details on how to learn about stocks/sales?

OK, you are going about the right way if you study up and learn on how investments work. I suggest you look at this short synopsis of Investing 101 and then go and buy the book "Investing for Dummies" (it’s a heck of a lot more sophisticated than its name implies) and is available on Half.com for as little as 75 cents:

http://www.investopedia.com/university/beginner/
http://search.half.ebay.com/investing-for-dummies_W0QQ_trksidZp2682Q2em1446Q2el2686QQmZbooks

As to investing other people's money, forget that for the time being. No serious investor is going to entrust you with his money, because you have no track record to show that you know what you are doing and in fact are good at it.

Put very few money in the real battle, then you will get some feelings of wins and loses. After that, read books and learn experiences from others. The more you are sure what you are doing, the more money you could put into the real battle.

For a new investor, the stock market can feel a lot like legalized gambling.
Not exactly. But unfortunately, that's how many new investors think of the stock market -- as a short-term investment vehicle that either brings huge monetary gains or devastating losses. With that attitude, the stock market is as reliable a form of investment as a game of roulette. But the more you learn about stocks, and the more you understand the true nature of stock market investment, the better and smarter you'll manage your money.
->The stock market can be intimidating, but a little information can help ease your fears. Let's start with some basic definitions. A share of stock is literally a share in the ownership of a company. When you buy a share of stock, you're entitled to a small fraction of the assets and earnings of that company. Assets include everything the company owns (buildings, equipment, trademarks), and earnings are all of the money the company brings in from selling its products and services.