Huh, okay. I'm a Stalker Kindred - I thought the "you must be the (nominal) leader of a group of Kroot (usually ten or more) who are part of your Kindred" meant I had to find 10+ other Stalkers and convince them to sign up with me. I'd been picturing it playing out something like finding an existing band of Stalkers who had lost their current Shaper for one reason or another and needed a new one.