The good news is that i don't believe doing a startup out of college is the best idea. Startups serving millennial are way over saturated. There are bigger and more important problems in areas that college grads haven't experienced yet. Get a job at a growing industry that you are interested in. Don't take the job just based on salary. Learn the ins and out of your trade. When you are ready to take the plunge your startup will have a better chance of being useful. Your insider experience and network will be a competitive advantage.