There's a thriving but reprehensible industry out there preying on folks (kids, mostly) who have dreams of stardom. There are variations but at the core, it works like this: Someone who has little if any ability to promote your career or get you work convinces you that they are wizards at both of these things.
It's bad enough when they convince you that you should hire them as your manager and pay them 15% or more of everything you make for the next X years. It's worse when as sometimes happens, it's not X years but forever. And it's even worse when they build in some clause that they will be Executive Producer of anything for which you're hired. Sign one of those and you might just as well forget about show business forever and get a job injecting the cream filling into cannolis.
That guy won't help you one bit and if by other means you somehow luck into work, he will show up and demand that he get whatever he thinks he deserves or he'll scotch the whole deal. But you know what's even worse than that? When they expect you to pay them money up front to do all that stuff to you.
Here's a recent example of some of that happening. This is more common than you might believe. A lot of vultures get away with this because the victims are embarrassed to admit, even to themselves, that they've been victimized.