I’m a beginner, and I’m finding measuring fabric straight really difficult. For example, I spent hours trying to measure out the pieces for a large oblong cushion cover. I borrowed a metal right angle, not really designed for sewing, and the results improved, but still not perfect. I expect it’s because fabric moves and flexes, even when you think it hasn’t. I think if I could just get this skill right, the sewing but would be so much easier. I’ve had a scan around this website, hoping to find a section with a few idiot guides for beginners. Is there one on here? If not, can you recommend a site that would help? Thank you