Ask HN: What should I do with 50k verified emails

I am working on my startup idea. I have collected about 50,000 verified names and email address of student and candidates looking for jobs. (Might reach 100,000 by the end of this week).

What should I do now ? Just cold email them to ask/try my platform or run paid ads on X, LinkedIn or Instagram.

How do I get attention and crack distribution, any suggestions ?