I'm going to be the asshole that points out that startups aren't an industry. They're businesses that operate in many industries. If you want to work with/for/building a startup, do that—but pick an industry you know something about or want to learn about. If you want to work in IP law with startups as your customers, that's a viable business as well—but your industry is IP law, not startups. Why make a big deal out of the distinction? Because if you're only focused on the startup, you're already going to fail.