One of the things YC gets you is access to lawyers. And if their lawyers don't have the expertise you need, they can send you to one who does and you can use t

One of the things YC gets you is access to lawyers. And if their lawyers don't have the expertise you need, they can send you to one who does and you can use the money you get to pay said lawyers. The fact that you know you need lawyers you can't currently afford is a good start because it shows you're at least thinking about the problem.