That would be a K hook. I might go a couple of sizes smaller, but that's just me. If a 10.5 works on worsted for you when you knit, it might when you crochet, too.
Basic hooks aren't that expensive, maybe two bucks apiece at worst, so buy or borrow a Boye and a Bates and try both to see which style you like. After that, you can get as exotic as you want to.
Welcome to crochet. I've been a happy hooker even longer than I've played with pointy sticks. There IS such a place as Crochetville.org, you know