margin call means that you have not enough money on the account to trade further. A broker will close all of your open position and ask to add more money on the account or even pay whatever exceeds your balance. see also a link below. I would suggest to stop trading real if you don't know basics
At a local Arcade I played Howie Mandel's "Deal or No Deal" game. I was down to 2 Cases, one with 10 Arcade tickets and the other with 200 Arcade tickets. The banker offered me 100 Tickets. I said "NO DEAL"! The case was opened. It was "10 tickets". I won the maximum 200 Tickets!
With the money I was able to win a small toy.