As with many other things, forex brokers are experts who have studied the markets for many years, read many articles, learned from their peers if you want to be good at something you need at least to have a little knowledge of what you're dealing with, or find somebody else that does.
This is where the internet can really help. Online forex trading is big business and, if you don't know what you're doing you really need to find a forex broker who does. Don't, however, be lured by false promises of becoming an overnight success, but if you are seriously interested in dabbling in the markets then online forex could be the answer for you. You need to make sure that the forex broker of your choice is properly qualified and legitimate, he should provide you with an amount of forex software and you'll also expect to hand over a minimum deposit. It's best to stick to this minimum, at least in the beginning until your broker has the chance to show you what he's made of.
If you're not too sure about the idea of long term investments, you might prefer to try your luck with a little day trading. This requires you to buy and sell the securities within a 24 hour period. This is considered to be a pretty risky business by some brokers (you usually need to use quite high stakes to make any real money) but by the same token can be very exciting, and there's nothing to stop you from making several trades in just one day, using the same stake money to make a profit several times over. If fast action and high potential profits sounds like your kind of fun, then maybe you should concentrate on watching the day trading action.
There are lots of gains to be made and fun to be had with forex trading, but you just need to be careful not to get carried away and always follow the advice of an expert, at least until you feel confident to go it alone. You can win fast and you can win big, but you can just as easily lose it all on the next trade remember that.