You have been given some wonderful advise. Remember that a quilt made from very pretty fabric doesn't show the mistakes that you see. It still stays pretty and will still keep you warm. One of my favorite quilts has the most flaws but since the fabric is so pretty, no one seems to notice. Just don't give up. I have made 4 practice squares of a new pattern out of scraps before diving into a costly project. Those practice squares became table topper gifts.