It is so impossible to trade without any single loss. But the thing is we can compensate every loss thru average down. So do not trade the whole money 100%. Always trade in portion. One more thing do not trade using margin if you dont know how to manage it.
Indeed, it is very impossible for your to not lose in trading, I mean loss is a part of trading because this is where we get experience and this is where we learn. Loss is not bad at all because this will be your inspiration to win back your loss money. If you lost then let it be however, don't let it happen again just learn from that mistake and you will become successful. Nobody's perfect.