Welcome, Valerie! I think you'll find we rarely have those little "glitches" you recently witnessed. But we're all human and prone to human reactions. You forgot to mention chocolate and QIs! What kind of the first do you prefer, and do you have any of the second? ;)
Mistakes? Us? Heavens -- we never made any! Personally, I made my first quilt with a polycotton blend that ravelled mercilessly. Who knew that it was easier/better to use 100% cotton? Live and learn! That quilt, BTW, is still one of my favorites -- probably because it was my first. :)
YES! Sorry to shout, but that machine is probably dry as a bone. Someone here will be able to help you with how to do that, if you'll give more details. Actually, a professional tune-up is probably in order.
You're right in that. Too bad about the treadle, though, since so many people seem to enjoy them for quilting.
Hang in there -- you don't need to be terrified. After all, the quilt police are so busy with the rest of us that they aren't likely to notice a newbie quite yet. ;)