Before you start trading for real try a demo account!

Trading is not an easy thing to do. You have to educate yourself first.
If you would like to test Forex with no cost at all a lot of Forex brokers are giving you the option to trade with demo account. A demo account is called demo because you can live the experience of Forex with no real trading involved. The trades you setup are not passed to the market but all the rules of Forex trading environment are there.
Demo accounts are the accounts that amateur investors are using in order to learn forex before applying their knowledge to real environment. Try it yourself! See it as a game. You may win or you may lose. But you will see what is Forex all about!