Start with learning the basics of Forex which is available online,
After which open a demo and learn how to execute orders on different platforms, learn the good currencies to trade.
Thereafter, open a demo that you will trade as if that was live money and see how it works out for you.
As far as the currencies are concerned, start with the majors: EUR/USD, USD/JPY and the GBP/USD maybe.
For the demo account sizes: have a mini, a micro and a standard with you.
I think you should go with a micro-account (as mentioned a few times before) and only trade 0.01 lots until you can achieve consistent profitability for a time-period you decide on (I picked 12 weeks for myself). When you accomplish that, you can increase your volume.
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