I can't sew a straight line on any of the machines that I have or by hand either. That's one of the reasons that I can't make "perfect" quilts. But all my imperfect quilts are loved by the ones that have received them and I have a long list of relatives that would really like one, too. So don't worry about straight perfect lines, just do your best and whoever gets your quilts will adore them, I'm quite sure.