Corky has said something that is the absolute truth, do not invest any money that you may need in the near future, rule of thumb, have 6 months living expenses in a savings account and then start investing slowly, pick good quality stocks that pay a dividend and play this and other free games as much as possible till you understand the workings of the market, government etc.
The first thing you want to do is decide if you want to invest for the long term like 5, 10 or more years or if you want to make a quick buck. If you choose the latter then you might as well play the ponies or go to Vegas because there is no get rich scheme in the stock market.
You'll here all those gurus tell you that they have a formula on how to get rich quick in the market lol, if that was true why would they want to tell you for only $99.99.