I’d rolled the pinky. This is pretty common, I usually just use pinky and index, but it doesn’t hurt to stack either like @faydout recommended. I kinda do both depending on the level of laziness I am at the time.
Yes. Josh will explain the stacking in the Billie Jean lesson if you haven’t gotten there yet. It’s easier for my stubby fingers to do a pinky roll (I also knifed a nerve in a kitchen accident in my ring finger and I’ve been purposely trying to strengthen my pinky so that helps). It’s really just whatever works best for you.