Well I've never knitted a sweater before, so I have a couple of questions.
1. Would this be a good first sweater?
I'm a bit intimidated at the thought of knitting a sweater, but in some ways, I figure I might as well just TRY it instead of whining about it - right?

2. What yarn could I substitute?
I would probably end up making the Large size, which is 13 skeins of the suggested yarn (Artful Yarns Olympic, a cotton/viscose/acrylic blend) - that adds up to about $103, which I'm not willing to pay. However, since I've never knitted an actual garment before, I don't know exactly
how to substitute the yarn. I know that it knits up at 4.75 sts/1 in, so it should be a worsted weight yarn. But unless I can find another yarn with those exact fibers in it, how would I know what other types of yarn would work? Plain cotton? Acrylic?
Thanks so much for any input! I really appreciate it.