My university offers a summer session drawing for beginners.

$100 is nothing for in-person instruction. Do it.

I'd do it. You have nothing to lose and 100$ is a phenomenal price for a course that lasts half the summer. I suppose you'll go through the basics of construction and value and do a lot of sketching, at your level definitive worth it. I'm a tad more advanced, but I'd also do it, just for having an instructor and people to talk about drawing. I'm lonely, I wish I knew artists in real life.