No specific time for the newbie to start trade with real account. From my experience, I only practicing demo account for only 1 week. And straight away deposit $30 and start trade using 0.01 lot which is equivalent to 1 cent every pips. It is because I want to feel the real feeling using real money. When I open the new post, I feel anxious, afraid and always want to sit in front of the computer all the time. I keep on learning and practicing, and now almost 2 years I'm still a forex traders.