First, congratulations on getting such a great machine! I've heard nothing but good things about the BL. Now, as for mistakes on a long arm, I've made so many it's unbelievable, although yours isn't one of them. I'm constantly amazed by the ladies here who just get their machine shipped to them and somehow manage to put it together and learn to use it on their own. I took private lessons to learn and honestly, I still call my dealer/instructor with at least one question pretty much every time I use my machine. I just don't have the natural talent that many others have, but I do have tenacity on my side!
Have fun learning! I'd love to hear how it's going and see pictures as you learn.