I think I know how you feel. I am very new to quilting and find myself worrying about cutting something wrong. I have taken some classes but am now working on a quilt top that I am learning from a book- no class. I worried so much about it and thought I would never get started. I worked slowly through each instruction and I have now made 4 blocks for the quilt. It helps me to put each set of cuts in a ziploc bag and label it as I cut. Good luck. I have sewn since I was a small child and was still intimidated by cutting quilt fabric. Do it like you eat an elephant- one bite at a time.