Remember, you are not alone in the market. Professional traders can make you a margin call quickly when you are not disciplined with your trading. The main thing is that you start trading and through the process of figuring out what went wrong and use it as a tool to rebuild your self to be more disciplined. Traders only human and every failure is a very emotional experience. Margin call does not mean a failure, Professional traders have also experienced that and the difference they learn from the experience and be better because of it.