It seems the key to completing my long delayed Summer and Winter sampler was there all along . . . I just had to get started! Once I'd begun the threading it was easy enough to finish it. Once I'd dressed the loom it was easy enough to start weaving. And once I'd started weaving it was easy enough to complete the first exercise. Here it is on the loom:
There's at least one more exercise to do on this warp. That's the lesson I missed, so I've arranged to meet our tutor tomorrow morning at the Guild. I'll have Friday to get it done. I think I can manage that, now that I've started.