Posting your exact build will help, because there's a lot of ways this can go... depending on your abilities and your talents.

You say you've got a high manipulation, but not a lot of personal skill with charisma skills... consider leaning heavily on intimidation and veiled threats. You don't SAY what you're going to do, but you imply that it could be any number of things, and they had better tell you what you want to know.

Blood-bond some humans in useful positions... gang leaders or cops, something to give you muscle. Heck, do both. Once they're blood-bound, they're a lot more useful, because they'll do what you say. With a bit of blood, they've also got Potence 1, and can beat the crap out of people even easier.

And, if all else fails, talk to your ST and see if you can't shift around some points.