It's so scary to be told you have endo. I remember I was barely out of recovery when I found out (and I was barely conscious) and I just blurted out "AM I EVER GOING TO HAVE A BABY?!?!?!" The good news is, endo is NOT an infertility sentence, and especially since only one of your tubes is closed, the odds are you will eventually conceive. And like Kerian said, after a lap you are very fertile, so take advantage of this time.
Good luck and welcome to the board!