I think Forex is more like trading rather than investing.
Stuff you need to learn
1) When to buy, sell and place your stop loss. (With Forex, you can choose to sell a curreny pair and close the position when the price rises). Have a trading plan. Keep a trading journal to record your profits and losses and any mistakes that you could have made or avoided.
2) Money management is also very important. With Forex, you have to deal with leverage and margin. With leverage, you can use a small amount of money to control a bigger sum of money.
3) Learn technical analysis of charts and watch out for news that could move currencies.
There are also people who trade solely on chart analysis or news. During the release of certain economic data, the forex market may get huge movement.
Benefits of Trading Forex
1) You can make money in both directions. Buy when a currency pair rises and short when a currency pair drops. Yuppie!
2) Unlike the stock market, there are only 4 major currecy pairs. (There are also other currency pairs). You can concentrate solely on 1 currency pair and study it to death.
3) You don't have to pay commissions when you trade

Just need to pay the spread difference for that particular currency pair you are trading. Each pair has different spread value and the value may increase during the release of economic data.
4) Unlike stock exchange, forex is a 24 hr market. You can trade from Mon - Sat (5 or 6 am I think). So there's plenty of trading opportunities. But don't force a trade. Only trade when certain conditions are met and fulfil your trading conditions (technical analysis).
5) Demo account is available for free with most brokerage. The demo account will let you get a feel of the realtime market and the brokerage's trading platform. You won't break a leg or lose a fortune when you blow your demo account.
6) The availabilty of Leverage. Although this magnify your profits, it also magnify your losses. You should be able to adjust your leverage setting so use it wisely.
I am still in the learning phase. Hope to make big bucks.
