if just make a transaction in the forex market, it easy steps, registers an account in the broker, let say in FXOpen, then create a demo account and install the platform, now you can use an android smartphone to running mt4 platform mobile, login account and you can start trading.
But the hard part in trading is how to make quality trading with end result always in profit, it's not easy, sometimes you buy but then price down, and when you sell but price move to an uptrend.