In this video, she’s using a nice chunky yarn, so it’s easier to see.
The good thing with blankets is that the size is whatever you want it to be. Just stop making your chain when you get one dimension right, and then finish with whatever row makes you happy. A single skein of the cheap SuperSaver/RedHeart can make ~8 sq. feet of area - a nice 2’ x 4’ baby blanket is a good size for a beginner. Blankets are also very forgiving of fuck-ups - which in crochet is usually forgetting a count (as a stoner, this is usually why I knit)
Single crochet is a stitch type. Crochet is about making chains, and then doing different stitches back into the chain. Single crochet is the most basic stitch. (There’s also double/triple/half-double, but these mean different things depending on where you are from).
[W]e found a loophole. Their systems were programmed in such a way that you didn’t have to receive 10 books, you only had to order 10 books. So we found an obscure book about lichens that they had in their system but was out of stock. We began ordering the one book we wanted and nine copies of the lichen book. They would ship out the book we needed and a note that said, “Sorry, but we’re out of the lichen book.” One of these days we’re going to get all those lichen books dumped onto our front lawn.