I would highly recommend finding a local yarn shop, usually they'll do knitting or crochet classes, and it's a great way to meet people. Places like Hobby Lobby or Michaels will have what you need, but, they won't have the selection of specialty yarns. (Which, if you want to do wearables, there's lots of amazing wools. and there's all sorts of other yarns that are just... Fun. I wouldn't recommend anything too frizzy or wild when you're starting out, so you can see what you're doing, but, uh. yeah.)