Hi Sarah,
Welcome to the course! As Paola said, there are a few of us here “reinventing our careers”; including me.
I do a bit of crochet every now and then; usually when it’s cold, so my projects can go over several years because I put it down again when the weather warms up. I will put in a plug for using YouTube to learn. There are heaps of instructional videos on there for beginner crochet-ers, which I have found very useful!