I think everyone has said it already. I also had a disaster or two at the start and nearly gave up. I took a class at a local guild for a three hour afternoon which gave me some courage really and a few tips. One of them was to pin the quilt adequately at the start. Anyhow I ended up practising more after that class and venture into free motion quilting which I honestly found so much easier than stitch in the ditch and I still find this. Break free and go wild. Try smaller samples first as they are easeir to turn etc. I'm no master with free motion but I have way less rules for myself and that makes it easier. Good luck.