Good job, keep it up!
About the loss - maybe you were not comfortable closing it because you were not prepared or you are not truly unemotional about your trade size. Whatever it is, I hope you prepare yourself for the next time.
Welcome aboard!
What I think it was, was I was trying to stay perfect, wanted to keep the green streak going, perfectionism has no place in trading, trading will never be perfect, unless you are one of those guys trying to sell some trading service, their trading is always perfect.