Hello, Evangelos. Welcome to the world of FOREX trading. Take the BabyPips courses offered here. They are free. Trade on a demo account or a very small live account. Practice, practice, practice.
You have a better chance of getting struck by lightning than getting rich quickly from trading. With that said, you have a very good chance of doing well for yourself as a trader if you treat it as a business, learn something new everyday, and be very patient. Athens wasn't built in a day.
Have fun, and remember, every loss is an opportunity to learn something.