Learn the fundamentals.
Read some books (Forex Patterns and Probabilities, and Trade Your Way to Financial Freedom are a good start).
Don't believe anything written by anyone trying to sell you something (as someone's already said, if something sounds too good to be true, it probably is).
Experiment on demo for a few months.
Read some more.
Make a trading plan, and follow it.
Treat it like a business, and not some effortless way to make cash if you can just find the right [system/robot/combination of indicators].
If you don't treat it seriously, you've got zero chance of success.
And most of all, enjoy the learning process (you'll go through some ups and downs mind!). 🙂