How do I get sponsors to be the youngest runner to cross America and support the cause for diabetes type 1?

Diabetes Type 1:

I am 14 and I am training to be able to run all the way across the continental US in hopes to set a record and at the same time be able to raise much needed money for the research and hope for a cure for type 1 diabetes, which I have and is on the rise, rapidly. I don’t know where to begin to get this cause started and actually make it worth something. I am hoping for huge contributions to this cause. How should I begin?