There is no specific time to become a trader because trading is a constant learning, every trade you make you learn something from it. You can start right a away but do not expect much at first since all trader started from scratch so its expected that you are still experimenting just keep on trading and of course study everything about trading you will eventually be a good trader. Always remember that Practice Makes Perfect.
Nice one! Practice Makes Perfect is the best words I ever heard here. Always remember too that There's always time for everything if you already start to trade on that day then that was your perfect timing for you to trade, we destined for something, you cannot tell that tomorrow will be your last day for trading. You cannot tell too that tomorrow I will start to trade because theres no specific time for someone to trade.
Study well about trading for you to be successful on it.