Did you try local communities first? It's a lot easier to kick these things off if you can find people who know your work ethics, or can experience first-hand, rather than convincing strangers online that your idea is not only good, but you too are competent enough to carry it out.

If you are really serious, maybe crowd-funding would be well suited?

I doubt you will get a PM from someone willing to put anything before you explain your idea in full, and also explain how you propose it be carried out.